Northern River Otter Lontra canadensis (Schreber, 1777)    Synonyms: North American River Otter.
Kingdom Animalia   >   Phylum Chordata   >   Class Mammalia   >   Order Carnivora   >   Family Mustelidae   >   Genus Lontra   

Status:

Our lovable, semi-aquatic weasel is found statewide, but is most common on the coastal plain near the Chesapeake Bay. It was formerly extirpated in western Maryland due to over-trapping, but reintroduction from the Eastern Shore population was very successful.

Relationships:

Feeds primarily on fish, mollusks, crustaceans, reptiles, and amphibians.

There are 213 records in the project database.

View taxon at iNaturalist

View taxon at NatureServe

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A Northern River Otter in Baltimore Co., Maryland (3/1/2014). Photo by Jon Corcoran. (MBP list)

A Northern River Otter in Baltimore Co., Maryland (3/1/2014). Photo by Jon Corcoran. (MBP list)

A Northern River Otter in Baltimore Co., Maryland (3/1/2014). Photo by Jon Corcoran. (MBP list)

A Northern River Otter in Calvert Co., Maryland (4/1/2017). Photo by Leslie Starr. (MBP list)

A Northern River Otter in Howard Co., Maryland (3/22/2015). Photo by Howard Patterson. (MBP list)

A Northern River Otter in Baltimore Co., Maryland (3/1/2020). Photo by Emily Stanley. (MBP list)

A Northern River Otter in Harford Co., Maryland (2/28/2016). Photo by Matthew Addicks. (MBP list)

A Northern River Otter in Baltimore Co., Maryland (5/7/2014). Photo by Wendy Crowe. (MBP list)

A Northern River Otter in Baltimore Co., Maryland (12/5/2019). Photo by Andrew Clemens. (MBP list)

A Northern River Otter at Oxbow Lake, Anne Arundel Co., Maryland (11/28/2010). Photo by Wendy Crowe. (MBP list)

A Northern River Otter bursts forth from a pond in pursuit of some domestic Muscovy Ducks - Somerset Co., Maryland (1/20/2013). Photo by Bill Hubick. (MBP list)

Northern River Otter in Calvert Co., Maryland (12/5/2021). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (11/8/2023). (c) wendyinmd, some rights reserved (CC BY-NC). Photo by wendyinmd via iNaturalist. (MBP list)

A Northern River Otter in a small pond in West Ocean City, Maryland (11/13/2010). Photo by Bill Hubick. (MBP list)

Northern River Otter in Montgomery Co., Maryland (2/7/2022). (c) Nick Hobgood, some rights reserved (CC BY-NC-ND). Photo by Nick Hobgood via iNaturalist. (MBP list)

A Northern River Otter on the ice at Brighton Dam, Howard Co., Maryland (1/4/2009). Photo by Nancy Magnusson. (MBP list)

Northern River Otter in Howard Co., Maryland (11/6/2020). (c) Tim Frye, some rights reserved (CC BY-NC). Photo by Tim Frye via iNaturalist. (MBP list)

Northern River Otter in Wicomico Co., Maryland (2/8/2024). Photo by Jonathan Irons. (MBP list)

A Northern River Otter in Prince George's Co., Maryland (10/26/2010). Photo by Rob Ostrowski. (MBP list)

Northern River Otter in Harford Co., Maryland (1/25/2017). Photo by Frank Marsden. (MBP list)

A Northern River Otter in Anne Arundel Co., Maryland (9/24/2017). Photo by Norma Broadwater. (MBP list)

A Northern River Otter den in Allegany Co., Maryland (Date obscured). (c) Josh Emm, some rights reserved (CC BY-NC). Photo by Josh Emm. (MBP list)

Northern River Otter with Bluegill prey in Prince George's Co., Maryland (1/27/2024). (c) Ken Clark, some rights reserved (CC BY). Photo by Ken Clark via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (2/17/2024). (c) johnmetz, some rights reserved (CC BY-NC). Photo by johnmetz via iNaturalist. (MBP list)

A Northern River Otter pawprint in Anne Arundel Co., Maryland (10/22/2020). Photo by Lynn Strauss. (MBP list)

Northern River Otter scat in Prince George's Co., Maryland (3/12/2016). Photo by Kerry Wixted. (MBP list)

Evidence of a Northern River Otter in Anne Arundel Co., Maryland (11/14/2017). Photo by Tyler Bell. (MBP list)

Northern River Otter pawprints in Calvert Co., Maryland (2/10/2019). Photo by Ben Springer. (MBP list)

Northern River Otter tracks on Assateague Island, Maryland (11/10/2013). Photo by Bill Hubick. (MBP list)

A Northern River Otter in Calvert Co., Maryland (3/18/2018). Photo by Jim Stasz. (MBP list)

Northern River Otter scat found in Garrett Co., Maryland (7/12/2014). Photo by Bill Hubick. (MBP list)

Northern River Otter scat in Worcester Co., Maryland (11/10/2017). Photo by Bill Hubick. (MBP list)

One of four River Otters at Brighton Dam, Howard Co., Maryland (1/4/2009). Photo by Nancy Magnusson. (MBP list)

Northern River Otter scat in Dorchester Co., Maryland (1/26/2019). Photo by Bill Hubick. (MBP list)

A Northern River Otter in Washington Co., Maryland (9/23/2017). Photo by Sue Muller. (MBP list)

A Northern River Otter in Anne Arundel Co., Maryland (9/24/2017). Photo by Norma Broadwater. (MBP list)

A Northern River Otter in Howard Co., Maryland (3/11/2015). Photo by Clayton Koonce. (MBP list)

A Northern River Otter in Talbot Co., Maryland (1/14/2018). Photo by Jared Satchell. (MBP list)

Northern River Otters in Baltimore Co., Maryland (3/25/2018). Photo by Mark Johnson. (MBP list)

A Northern River Otter in Kent Co., Maryland (3/4/2018). Photo by Nancy Wyman. (MBP list)

A Northern River Otter in Montgomery Co., Maryland (3/28/2018). Photo by Jerri Matchinsky. (MBP list)

Northern River Otter scat in Worcester Co., Maryland (9/22/2018). Photo by Bill Hubick. (MBP list)

Northern River Otter fecal remains composed mostly of fish scales and bones in Anne Arundel Co., Maryland (12/23/2018). Photo by Matt Grey. (MBP list)

A Northern River Otter in Queen Anne's Co., Maryland (2/15/2019). Photo by Daniel Irons. (MBP list)

A Northern River Otter in Harford Co., Maryland (3/1/2019). Photo by Mark Johnson. (MBP list)

A Northern River Otter in Harford Co., Maryland (4/4/2019). Photo by Mark Johnson. (MBP list)

Northern River Otters in Howard Co., Maryland (11/4/2019). Photo by Clayton Koonce. (MBP list)

A Northern River Otter in St. Mary's Co., Maryland (12/4/2019). Photo by Ben Springer. (MBP list)

A Northern River Otter in Garrett Co., Maryland (3/8/2020). Photo by William Blauvelt. (MBP list)

Northern River Otters in St. Mary's Co., Maryland (3/22/2020). Photo by Ben Springer. (MBP list)

Northern River Otter in Anne Arundel Co., Maryland (1/8/2019). (c) karenmcdonald, some rights reserved (CC BY-NC). Photo by karenmcdonald via iNaturalist. (MBP list)

Northern River Otter in Anne Arundel Co., Maryland (1/1/2017). (c) fm5050, all rights reserved. Photo by fm5050 via iNaturalist. (MBP list)

Northern River Otter in Allegany Co., Maryland (12/20/2009). (c) David Yeany, some rights reserved (CC BY-NC). Photo by David Yeany via iNaturalist. (MBP list)

A Northern River Otter in Howard Co., Maryland (2/1/2020). Photo by Sue Muller. (MBP list)

Northern River Otter in Garrett Co., Maryland (3/8/2020). (c) Bill Blauvelt, some rights reserved (CC BY-NC). Photo by Bill Blauvelt via iNaturalist. (MBP list)

Northern River Otter in Anne Arundel Co., Maryland (2/23/2013). (c) tienglander, some rights reserved (CC BY-NC). Photo by tienglander via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (11/6/2020). (c) Tim Frye, some rights reserved (CC BY-NC). Photo by Tim Frye via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (11/6/2020). (c) Tim Frye, some rights reserved (CC BY-NC). Photo by Tim Frye via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (11/6/2020). (c) Tim Frye, some rights reserved (CC BY-NC). Photo by Tim Frye via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (11/6/2020). (c) Tim Frye, some rights reserved (CC BY-NC). Photo by Tim Frye via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (11/6/2020). (c) Tim Frye, some rights reserved (CC BY-NC). Photo by Tim Frye via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (11/9/2020). (c) mikey35000, some rights reserved (CC BY-NC). Photo by mikey35000 via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (5/9/2020). (c) severinus, some rights reserved (CC BY-NC). Photo by severinus via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (5/9/2020). (c) severinus, some rights reserved (CC BY-NC). Photo by severinus via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (4/13/2019). (c) lace winks, some rights reserved (CC BY-NC). Photo by lace_winks via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (5/2/2017). (c) mkmcceney, all rights reserved. Photo by Melissa McCeney. (MBP list)

Northern River Otter in Frederick Co., Maryland (8/8/2017). No rights reserved. Photo by Andy Wilson via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (7/31/2020). (c) Sean Sipple, all rights reserved. Photo by Sean Sipple via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (11/17/2020). (c) bugzilla, some rights reserved (CC BY-NC). Photo by bugzilla via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (11/17/2020). (c) bugzilla, some rights reserved (CC BY-NC). Photo by bugzilla via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (11/17/2020). (c) bugzilla, some rights reserved (CC BY-NC). Photo by bugzilla via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (11/17/2020). (c) bugzilla, some rights reserved (CC BY-NC). Photo by bugzilla via iNaturalist. (MBP list)

Northern River Otter in Dorchester Co., Maryland (12/19/2020). (c) coreyotter, some rights reserved (CC BY-NC). Photo by coreyotter via iNaturalist. (MBP list)

Northern River Otter in Dorchester Co., Maryland (12/19/2020). (c) coreyotter, some rights reserved (CC BY-NC). Photo by coreyotter via iNaturalist. (MBP list)

Northern River Otter in Queen Anne's Co., Maryland (12/21/2020). (c) jakeschneider00, some rights reserved (CC BY-NC). Photo by jakeschneider00 via iNaturalist. (MBP list)

Northern River Otter in Queen Anne's Co., Maryland (12/21/2020). (c) jakeschneider00, some rights reserved (CC BY-NC). Photo by jakeschneider00 via iNaturalist. (MBP list)

Northern River Otter in Frederick Co., Maryland (1/4/2021). No rights reserved. Photo by Andy Wilson via iNaturalist. (MBP list)

Northern River Otter in Allegany Co., Maryland (1/21/2021). (c) olivia s, some rights reserved (CC BY-NC). Photo by olivia_s via iNaturalist. (MBP list)

Northern River Otter in Allegany Co., Maryland (1/21/2021). (c) olivia s, some rights reserved (CC BY-NC). Photo by olivia_s via iNaturalist. (MBP list)

Northern River Otter in Allegany Co., Maryland (1/21/2021). (c) olivia s, some rights reserved (CC BY-NC). Photo by olivia_s via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (8/22/2020). (c) Daniel Spears, some rights reserved (CC BY-NC). Photo by Daniel Spears via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (2/9/2021). (c) Daniel Spears, some rights reserved (CC BY-NC). Photo by Daniel Spears via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (1/15/2021). (c) Daniel Spears, some rights reserved (CC BY-NC). Photo by Daniel Spears via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (5/9/2020). (c) Acadia Kocher, some rights reserved (CC BY-NC). Photo by Acadia Kocher via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC). Photo by John Hall. (MBP list)

Northern River Otter in St. Mary's Co., Maryland (Date obscured). (c) jstandish, some rights reserved (CC BY-NC). Photo by jstandish via iNaturalist. (MBP list)

A Northern River Otter in Anne Arundel Co., Maryland (12/8/2020). Photo by Joe Hanfman. (MBP list)

Northern River Otter in Kent Co., Maryland (6/10/2021). (c) lisajake128, some rights reserved (CC BY-NC). Photo by lisajake128 via iNaturalist. (MBP list)

Northern River Otter in Kent Co., Maryland (6/10/2021). (c) lisajake128, some rights reserved (CC BY-NC). Photo by lisajake128 via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (10/28/2021). (c) Gregg Petersen, some rights reserved (CC BY-NC). Photo by Gregg Petersen via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (10/28/2021). (c) Gregg Petersen, some rights reserved (CC BY-NC). Photo by Gregg Petersen via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (10/28/2021). (c) Gregg Petersen, some rights reserved (CC BY-NC). Photo by Gregg Petersen via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (12/5/2021). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (12/5/2021). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (12/5/2021). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (12/5/2021). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (1/6/2022). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (1/6/2022). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in St. Mary's Co., Maryland (1/18/2022). (c) Benji Beluga, some rights reserved (CC BY-NC). Photo by Ben Springer. (MBP list)

Northern River Otter in Allegany Co., Maryland (1/23/2022). (c) Bill Blauvelt, some rights reserved (CC BY-NC). Photo by Bill Blauvelt via iNaturalist. (MBP list)

Northern River Otter in Allegany Co., Maryland (1/23/2022). (c) Bill Blauvelt, some rights reserved (CC BY-NC). Photo by Bill Blauvelt via iNaturalist. (MBP list)

Northern River Otter in Allegany Co., Maryland (1/23/2022). (c) Bill Blauvelt, some rights reserved (CC BY-NC). Photo by Bill Blauvelt via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (1/30/2022). (c) margotpolo, some rights reserved (CC BY-NC). Photo by margotpolo via iNaturalist. (MBP list)

Northern River Otter in Caroline Co., Maryland (1/24/2022). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Northern River Otter in Anne Arundel Co., Maryland (2/6/2022). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Northern River Otter in Anne Arundel Co., Maryland (2/6/2022). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Northern River Otter in Garrett Co., Maryland (2/7/2022). (c) smosser, some rights reserved (CC BY-NC). Photo by smosser via iNaturalist. (MBP list)

Northern River Otter in Garrett Co., Maryland (2/7/2022). (c) smosser, some rights reserved (CC BY-NC). Photo by smosser via iNaturalist. (MBP list)

Northern River Otter in Garrett Co., Maryland (2/7/2022). (c) smosser, some rights reserved (CC BY-NC). Photo by smosser via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (2/7/2022). (c) Nick Hobgood, some rights reserved (CC BY-NC-ND). Photo by Nick Hobgood via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (2/7/2022). (c) Nick Hobgood, some rights reserved (CC BY-NC-ND). Photo by Nick Hobgood via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (2/7/2022). (c) Nick Hobgood, some rights reserved (CC BY-NC-ND). Photo by Nick Hobgood via iNaturalist. (MBP list)

Northern River Otter in Frederick Co., Maryland (2/13/2022). No rights reserved. Photo by Andy Wilson via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (2/11/2022). (c) belby, some rights reserved (CC BY-NC). Photo by Bonnie Bell. (MBP list)

Northern River Otter in Frederick Co., Maryland (3/9/2022). No rights reserved. Photo by Andy Wilson via iNaturalist. (MBP list)

Northern River Otter in Carroll Co., Maryland (3/14/2022). (c) tomfeild, some rights reserved (CC BY-NC). Photo by Tom Feild. (MBP list)

Northern River Otter in Carroll Co., Maryland (3/14/2022). (c) tomfeild, some rights reserved (CC BY-NC). Photo by Tom Feild. (MBP list)

Northern River Otter in Prince George's Co., Maryland (3/16/2022). (c) Matt Cohen and Elizabeth Hargrave, some rights reserved (CC BY-NC). Photo by Matt Cohen and Elizabeth Hargrave via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (3/16/2022). (c) Matt Cohen and Elizabeth Hargrave, some rights reserved (CC BY-NC). Photo by Matt Cohen and Elizabeth Hargrave via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (3/16/2022). (c) Matt Cohen and Elizabeth Hargrave, some rights reserved (CC BY-NC). Photo by Matt Cohen and Elizabeth Hargrave via iNaturalist. (MBP list)

Northern River Otter in Garrett Co., Maryland (3/16/2022). (c) Bill Blauvelt, some rights reserved (CC BY-NC). Photo by Bill Blauvelt via iNaturalist. (MBP list)

Northern River Otter in Garrett Co., Maryland (3/16/2022). (c) Bill Blauvelt, some rights reserved (CC BY-NC). Photo by Bill Blauvelt via iNaturalist. (MBP list)

Northern River Otter in Garrett Co., Maryland (3/19/2022). (c) Bill Blauvelt, some rights reserved (CC BY-NC). Photo by Bill Blauvelt via iNaturalist. (MBP list)

Northern River Otter in Frederick Co., Maryland (4/3/2022). No rights reserved. Photo by Andy Wilson via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (12/3/2021). (c) Emily L. Stanley, some rights reserved (CC BY-NC). Photo by Emily Stanley. (MBP list)

Northern River Otter in Baltimore Co., Maryland (4/18/2022). (c) Emily L. Stanley, some rights reserved (CC BY-NC). Photo by Emily Stanley. (MBP list)

Northern River Otter in Baltimore Co., Maryland (4/25/2022). (c) akamediancat, some rights reserved (CC BY-NC). Photo by akamediancat via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (5/8/2022). (c) Erin, some rights reserved (CC BY-NC). Photo by Erin via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (5/8/2022). (c) Erin, some rights reserved (CC BY-NC). Photo by Erin via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (8/4/2022). (c) Dave Roberts, some rights reserved (CC BY-NC). Photo by Dave Roberts. (MBP list)

Northern River Otter in Montgomery Co., Maryland (8/14/2022). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (8/14/2022). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (8/14/2022). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (8/14/2022). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (8/14/2022). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (8/14/2022). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Northern River Otter in Cecil Co., Maryland (8/15/2022). (c) bdale1334, some rights reserved (CC BY-NC). Photo by bdale1334 via iNaturalist. (MBP list)

Northern River Otter in Cecil Co., Maryland (8/15/2022). (c) bdale1334, some rights reserved (CC BY-NC). Photo by bdale1334 via iNaturalist. (MBP list)

Northern River Otter in Cecil Co., Maryland (8/15/2022). (c) bdale1334, some rights reserved (CC BY-NC). Photo by bdale1334 via iNaturalist. (MBP list)

Northern River Otter in Allegany Co., Maryland (Date obscured). (c) Kyle Klotz, all rights reserved. Photo by Kyle Klotz. (MBP list)

Northern River Otter in Worcester Co., Maryland (11/13/2010). (c) Matt Tillett, some rights reserved (CC BY-NC). Photo by mtillett via iNaturalist. (MBP list)

Northern River Otter in Worcester Co., Maryland (9/24/2022). (c) Amy, some rights reserved (CC BY-NC). Photo by Amy via iNaturalist. (MBP list)

Northern River Otter in Worcester Co., Maryland (9/24/2022). (c) Amy, some rights reserved (CC BY-NC). Photo by Amy via iNaturalist. (MBP list)

Northern River Otter in Worcester Co., Maryland (9/24/2022). (c) Amy, some rights reserved (CC BY-NC). Photo by Amy via iNaturalist. (MBP list)

Northern River Otter in Allegany Co., Maryland (8/15/2022). (c) greener sphere 4, some rights reserved (CC BY-NC). Photo by greener_sphere_4 via iNaturalist. (MBP list)

Northern River Otter in Allegany Co., Maryland (8/15/2022). (c) greener sphere 4, some rights reserved (CC BY-NC). Photo by greener_sphere_4 via iNaturalist. (MBP list)

Northern River Otter in Allegany Co., Maryland (8/15/2022). (c) greener sphere 4, some rights reserved (CC BY-NC). Photo by greener_sphere_4 via iNaturalist. (MBP list)

Northern River Otter in Allegany Co., Maryland (8/15/2022). (c) greener sphere 4, some rights reserved (CC BY-NC). Photo by greener_sphere_4 via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (11/9/2022). (c) Gregg Petersen, some rights reserved (CC BY-NC). Photo by Gregg Petersen via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (11/9/2022). (c) Gregg Petersen, some rights reserved (CC BY-NC). Photo by Gregg Petersen via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (11/9/2022). (c) Gregg Petersen, some rights reserved (CC BY-NC). Photo by Gregg Petersen via iNaturalist. (MBP list)

Northern River Otter in St. Mary's Co., Maryland (5/9/2017). (c) Alina Martin, all rights reserved. Photo by Alina Martin via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (1/6/2023). (c) smuller, some rights reserved (CC BY-NC). Photo by Sue Muller. (MBP list)

Northern River Otter in Howard Co., Maryland (1/6/2023). (c) smuller, some rights reserved (CC BY-NC). Photo by Sue Muller. (MBP list)

Northern River Otter in Howard Co., Maryland (1/5/2023). (c) math4mary, some rights reserved (CC BY-NC). Photo by math4mary via iNaturalist. (MBP list)

Northern River Otter in Wicomico Co., Maryland (1/10/2023). (c) kgills, some rights reserved (CC BY-NC). Photo by kgills via iNaturalist. (MBP list)

Northern River Otter in Wicomico Co., Maryland (1/10/2023). (c) kgills, some rights reserved (CC BY-NC). Photo by kgills via iNaturalist. (MBP list)

Northern River Otter in Wicomico Co., Maryland (1/10/2023). (c) kgills, some rights reserved (CC BY-NC). Photo by kgills via iNaturalist. (MBP list)

Northern River Otter in Wicomico Co., Maryland (1/10/2023). (c) kgills, some rights reserved (CC BY-NC). Photo by kgills via iNaturalist. (MBP list)

Northern River Otter in Wicomico Co., Maryland (1/10/2023). (c) kgills, some rights reserved (CC BY-NC). Photo by kgills via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (1/15/2023). (c) Jim, some rights reserved (CC BY-NC). Photo by Jim via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (1/15/2023). (c) Jim, some rights reserved (CC BY-NC). Photo by Jim via iNaturalist. (MBP list)

Northern River Otter in Worcester Co., Maryland (1/28/2023). (c) danieltayloroc, some rights reserved (CC BY-NC). Photo by danieltayloroc via iNaturalist. (MBP list)

Northern River Otter in Talbot Co., Maryland (12/18/2022). (c) Jonathan Irons, some rights reserved (CC BY-NC). Photo by Jonathan Irons. (MBP list)

Northern River Otter in Prince George's Co., Maryland (2/3/2023). (c) cricketfrog13, some rights reserved (CC BY-NC). Photo by cricketfrog13 via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (2/3/2023). (c) cricketfrog13, some rights reserved (CC BY-NC). Photo by cricketfrog13 via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (7/27/2009). (c) Robert Ostrowski, some rights reserved (CC BY-NC). Photo by Robert Ostrowski via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/16/2023). (c) Anacostia Watershed Society, some rights reserved (CC BY-NC). Photo by Anacostia Watershed Society via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/16/2023). (c) Anacostia Watershed Society, some rights reserved (CC BY-NC). Photo by Anacostia Watershed Society via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/17/2023). (c) Anacostia Watershed Society, some rights reserved (CC BY-NC). Photo by Anacostia Watershed Society via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/17/2023). (c) Anacostia Watershed Society, some rights reserved (CC BY-NC). Photo by Anacostia Watershed Society via iNaturalist. (MBP list)

Northern River Otter in Dorchester Co., Maryland (2/10/2023). (c) Ron Wertz, some rights reserved (CC BY-NC-SA). Photo by Ron Wertz via iNaturalist. (MBP list)

Northern River Otter in Dorchester Co., Maryland (2/10/2023). (c) Ron Wertz, some rights reserved (CC BY-NC-SA). Photo by Ron Wertz via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (2/21/2023). (c) Jeff S., some rights reserved (CC BY-NC). Photo by eaglescouter2003 via iNaturalist. (MBP list)

A Northern River Otter in Cecil Co., Maryland (2/26/2023). Photo by Mark Johnson. (MBP list)

Northern River Otter in Calvert Co., Maryland (4/29/2023). (c) Karyn Molines, some rights reserved (CC BY-NC). Photo by Karyn Molines via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (4/29/2023). (c) Karyn Molines, some rights reserved (CC BY-NC). Photo by Karyn Molines via iNaturalist. (MBP list)

Northern River Otter in Dorchester Co., Maryland (6/16/2023). (c) bow brown brook, some rights reserved (CC BY-NC). Photo by bow_brown_brook via iNaturalist. (MBP list)

Northern River Otter in Dorchester Co., Maryland (6/16/2023). (c) bow brown brook, some rights reserved (CC BY-NC). Photo by bow_brown_brook via iNaturalist. (MBP list)

Northern River Otter in Dorchester Co., Maryland (6/16/2023). (c) bow brown brook, some rights reserved (CC BY-NC). Photo by bow_brown_brook via iNaturalist. (MBP list)

Northern River Otter in Dorchester Co., Maryland (6/16/2023). (c) bow brown brook, some rights reserved (CC BY-NC). Photo by bow_brown_brook via iNaturalist. (MBP list)

Northern River Otter in Harford Co., Maryland (12/14/2014). (c) Edoro, some rights reserved (CC BY). Photo by Ronald Orosz via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (3/19/2015). (c) Jason E. Avery, some rights reserved (CC BY-NC). Photo by Jason Avery. (MBP list)

Northern River Otter in Baltimore Co., Maryland (11/8/2023). (c) wendyinmd, some rights reserved (CC BY-NC). Photo by wendyinmd via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (11/14/2023). (c) carriestaples, some rights reserved (CC BY-NC). Photo by carriestaples via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (11/14/2023). (c) carriestaples, some rights reserved (CC BY-NC). Photo by carriestaples via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (11/14/2023). (c) carriestaples, some rights reserved (CC BY-NC). Photo by carriestaples via iNaturalist. (MBP list)

Northern River Otter in Anne Arundel Co., Maryland (12/9/2023). (c) kwixted0, some rights reserved (CC BY-NC). Photo by Kerry Wixted. (MBP list)

Northern River Otter in Baltimore Co., Maryland (3/6/2020). (c) oriolekec1, some rights reserved (CC BY-NC). Photo by oriolekec1 via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (3/6/2020). (c) oriolekec1, some rights reserved (CC BY-NC). Photo by oriolekec1 via iNaturalist. (MBP list)

Northern River Otter in Baltimore City, Maryland (12/25/2023). (c) kwixted0, some rights reserved (CC BY-NC). Photo by Kerry Wixted. (MBP list)

Northern River Otter in Anne Arundel Co., Maryland (12/30/2023). (c) kwixted0, some rights reserved (CC BY-NC). Photo by Kerry Wixted. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/7/2024). (c) C A Rytting, some rights reserved (CC BY-NC). Photo by C. A. Rytting via iNaturalist. (MBP list)

Northern River Otter in Worcester Co., Maryland (1/13/2024). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/27/2024). (c) Ken Clark, some rights reserved (CC BY). Photo by Ken Clark via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/27/2024). (c) Ken Clark, some rights reserved (CC BY). Photo by Ken Clark via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/27/2024). (c) Ken Clark, some rights reserved (CC BY). Photo by Ken Clark via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/27/2024). (c) Ken Clark, some rights reserved (CC BY). Photo by Ken Clark via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/27/2024). (c) Ken Clark, some rights reserved (CC BY). Photo by Ken Clark via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (2/2/2024). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Baltimore Co., Maryland (Date obscured). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Northern River Otter in Wicomico Co., Maryland (2/8/2024). (c) Jonathan Irons, some rights reserved (CC BY-NC). Photo by Jonathan Irons via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (2/10/2024). (c) cyansidy, some rights reserved (CC BY-NC). Photo by cyansidy via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (2/17/2024). (c) johnmetz, some rights reserved (CC BY-NC). Photo by johnmetz via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (2/17/2024). (c) johnmetz, some rights reserved (CC BY-NC). Photo by johnmetz via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (3/3/2024). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (3/3/2024). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (3/3/2024). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (3/3/2024). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (3/2/2024). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (3/2/2024). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Queen Anne's Co., Maryland (3/17/2024). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Northern River Otter in Queen Anne's Co., Maryland (3/17/2024). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Northern River Otter in Calvert Co., Maryland (3/10/2020). (c) rosalie-rick, all rights reserved. Photo by rosalie-rick via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (4/26/2024). (c) Jenny Glenn, some rights reserved (CC BY-NC). Photo by Jenny Glenn via iNaturalist. (MBP list)

Northern River Otter in Calvert Co., Maryland (4/26/2024). (c) Jenny Glenn, some rights reserved (CC BY-NC). Photo by Jenny Glenn via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (1/10/2020). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (1/10/2020). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (1/10/2020). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (1/10/2020). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Northern River Otter in Howard Co., Maryland (1/10/2020). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Northern River Otter in Harford Co., Maryland (7/13/2024). (c) mdhafner, some rights reserved (CC BY-NC). Photo by Matt Hafner. (MBP list)

Northern River Otter scat in Worcester Co., Maryland (3/25/2017). Photo by Bill Hubick. (MBP list)

A Northern River Otter in Howard Co., Maryland. Photo by Sue Muller. (MBP list)

Northern River Otter in Prince George's Co., Maryland (2/25/2019). (c) Dany Sloan, some rights reserved (CC BY-NC). Photo by Dany Sloan via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/22/2017). Photo by Jerry Herman. (MBP list)

Northern River Otter in Baltimore Co., Maryland (12/5/2019). Photo by Andrew Clemens. (MBP list)

Northern River Otter in Baltimore Co., Maryland (12/5/2019). Photo by Andrew Clemens. (MBP list)

Northern River Otter in Montgomery Co., Maryland (6/7/2018). Photo by Bonnie Bell. (MBP list)

Northern River Otter in Montgomery Co., Maryland (4/3/2021). (c) dtread1, some rights reserved (CC BY-NC). Photo by dtread1 via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (4/3/2021). (c) dtread1, some rights reserved (CC BY-NC). Photo by dtread1 via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (4/3/2021). (c) dtread1, some rights reserved (CC BY-NC). Photo by dtread1 via iNaturalist. (MBP list)

Northern River Otter in Montgomery Co., Maryland (4/3/2021). (c) dtread1, some rights reserved (CC BY-NC). Photo by dtread1 via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/11/2021). (c) Janet Gingold, some rights reserved (CC BY-NC). Photo by Janet Gingold via iNaturalist. (MBP list)

Northern River Otter in Prince George's Co., Maryland (1/11/2021). (c) Janet Gingold, some rights reserved (CC BY-NC). Photo by Janet Gingold via iNaturalist. (MBP list)

Northern River Otter in Queen Anne's Co., Maryland (3/17/2024). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)


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