I am feeling more confident I can tell the difference between an American Crow and a Fish Crow after two mornings in a row of a Fish Crow Convention, with attendees between 5 and 20 birds calling their uh-uhs from the Norfolk Island pine in our front yard.
From my bird ID Bible, Cornell Lab of Ornithology…
Not everyone realizes it, but there are two kinds of crows across much of the eastern United States. Looking almost identical to the ubiquitous American Crow, Fish Crows are tough to identify until you learn their nasal calls. Look for them around bodies of water, usually in flocks and sometimes with American Crows. They are supreme generalists, eating just about anything they can find. Fish Crows have expanded their range inland and northward along major river systems in recent decades.
Fish Crows have a distinctive caw that is short, nasal and quite different-sounding from an American Crow. This call is sometimes doubled-up with an inflection similar to someone saying uh-uh.
Size & Shape
Fish Crows fit the standard crow shape: hefty, well-proportioned birds with heavy bills, sturdy legs, and broad wings. At rest, Fish Crows’ wings fall short of their medium-length, square tails.
Fish Crows are all black. Immatures are less glossy and can become brownish as their feathers wear in their first year.
Fish Crows are very social birds—look for them in pairs in the breeding season and up to several hundred or more during migration or winter. When feeding and roosting they may mix with American Crows. When Fish Crows give their distinctive nasal calls from the ground, they often puff out their neck and body feathers, forming a distinctive, ragged ruff on the throat.
Fish crow, check! My 21st Florida bird photographed and ID’ed since we moved here Dec. 6, one month ago.