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The birdFish Crow (Corvus ossifragus)
20230827 fish crow south meadows PND00775 1-topaz-enhance-3600h by Paul Danese, via Wikimedia Commons, licensed under CC BY-SA 4.0
corvid

Fish Crow

Corvus ossifragus

A slender, glossy all-black corvid of coastal and riverine eastern North America, distinguished from the larger American Crow mainly by voice and slightly smaller size.

Feather type
Contour and flight feathers
Colours
Glossy all-black with a blue-purple sheen
Bird size
Smaller than American Crow, ~36-41 cm

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Overview

The Fish Crow is a corvid of the eastern and southeastern United States, closely tied to coastlines, rivers, and other waterways. It closely resembles the more widespread American Crow in plumage, being almost entirely glossy black, and the two species are best separated by voice and subtle size and shape differences rather than plumage alone.

Its range has expanded inland along river systems in recent decades, bringing it into closer contact with American Crow across a broader area.

Identifying the Feather

  • Body, wing, and tail feathers are entirely glossy black, showing a blue-purple sheen in good light
  • Feathers are generally slightly smaller and more slender than those of the closely similar American Crow, though this difference is subtle and not always reliable on its own
  • No white, barring, or other contrasting pattern is present anywhere in the plumage
  • Primary flight feathers are proportionately narrower than in the American Crow in some individuals
  • Because plumage is essentially identical to the American Crow, a single feather alone is rarely conclusive; call, size, and location provide the most reliable confirmation

Plumage & Molt

Sexes are alike in plumage, both entirely glossy black. Juveniles are duller and somewhat browner-black before acquiring full adult gloss. A single complete molt occurs after the breeding season.

Habitat & Range

  • Found along the Atlantic and Gulf coasts of the United States, and increasingly inland along major river systems
  • Favors coastal areas, beaches, tidal rivers, and, increasingly, inland waterways and adjacent towns
  • Largely resident, though some northern populations shift southward in winter

Behavior & Field Notes

Fish Crows are gregarious, often foraging in groups near water, and have a broad, opportunistic diet including small aquatic animals, eggs, and various invertebrates. Their voice, a nasal, two-noted 'uh-uh' or 'ca-ha,' is the most reliable way to distinguish them from the American Crow's straightforward 'caw.' They nest colonially in trees, often near water, and defend nest sites with alarm calls.

Frequently asked questions

Can a single feather reliably separate this species from the American Crow?

Not with full confidence. Plumage is nearly identical between the two species, so voice, size, and location are more reliable identification tools than an isolated feather.

Is the Fish Crow smaller than the American Crow?

Yes, it is somewhat smaller and more slender overall, though the size difference can be subtle in the field or with a single feather.

What is the best way to confirm this species when a bird is seen?

Its distinctive nasal 'uh-uh' call is the most reliable field mark, differing clearly from the American Crow's flatter 'caw.'

Where is this species typically found?

Along coasts and rivers of the eastern and southeastern United States, with a growing inland presence along major waterways.