Species Comparisons • Backyard Identification
American Crow vs Fish Crow
American Crow
American Crow • Wikimedia Commons
American Crow
American Crow • Wikimedia Commons
American Crow
American Crow • Wikimedia Commons
American Crow
American Crow • Wikimedia Commons
Fish Crow
Fish Crow • Wikimedia Commons
Fish Crow
Fish Crow • Wikimedia Commons
Fish Crow
Fish Crow • Wikimedia Commons
Fish Crow
Fish Crow • Wikimedia Commons
American Crow vs Fish Crow (Corvus brachyrhynchos vs Corvus ossifragus): The Complete Backyard Identification Guide
Field Summary
Quick Answer: The Fastest Way to Tell Them Apart
The hardest crow identification in North America. Three rules:
- Listen first: a nasal, abrupt two-note “uh-uh” or “cah-ah” = Fish Crow; the clear, full-throated “caw-caw” = American Crow. Voice is the dependable field mark.
- Size second: Fish Crows average smaller with a smaller bill and quicker wingbeats — useful only with direct comparison.
- Map check: Fish Crows live along the Atlantic and Gulf coasts and inland river valleys of the Southeast, expanding north; American Crows occur nearly everywhere.
At-a-Glance Comparison Table
The twin crows, side by side. KEY rows separate fastest.
| Feature | American Crow | Fish Crow |
|---|---|---|
| Scientific Name | Corvus brachyrhynchos | Corvus ossifragus |
| Length KEY | 17.5 in (45 cm) | 14.2–15.8 in (36–40 cm) |
| Wingspan | 36–39 in (91–100 cm) | 33 in (84 cm) |
| Weight | 11–21 oz (320–600 g) | 7.4–11.3 oz (210–320 g) |
| Overall Shape | Large all-black songbird with a fan-shaped tail | A slightly smaller, slimmer crow |
| Male Plumage | Entirely black with a slight gloss; stout black bill (sexes alike) | Entirely black — visually almost identical to the American Crow (sexes alike) |
| Female Plumage | Identical to the male, averaging slightly smaller | Identical to the male |
| Bill Shape | Stout, straight, all-black bill | Slightly slimmer black bill than American Crow |
| Tail | Squared to slightly rounded fan tail | Squared fan tail |
| Core Range KEY | Nearly the entire US and southern Canada; cities, farms, woods and shores | Atlantic and Gulf coasts and river valleys of the Southeast |
| Migration | Mostly resident; northern birds shift south in winter roosts | Mostly resident; some northern movement in winter |
| Feeder Presence | Takes cracked corn, peanuts, eggs and table scraps from platforms | Beach, dock and riverside scavenger; takes corn and scraps |
| Favorite Foods | Omnivore: grain, insects, carrion, eggs, fruit, refuse | Fish, crabs, carrion, eggs, grain, refuse |
| Song KEY | The familiar loud “caw-caw-caw” | A nasal, doubled “uh-uh” — as if answering “no” |
| Flight Call | Varied caws; also rattles and knocks | Nasal “car-car” distinctly thinner than American Crow |
| Population Trend | Common and adaptable; numbers fluctuate with West Nile virus cycles | Common along the coast; expanding inland along rivers |
Male Field Marks, Side by Side
American Crow — Male
Corvus brachyrhynchos
- All black with a squared fan tail.
- Steady rowing wingbeats in flight.
- Familiar loud “caw-caw”.
Fish Crow — Male
Corvus ossifragus
- Nearly identical to American Crow — trust the voice.
- Slightly smaller and slimmer-billed.
- Coastal and riverside distribution.
Female & Juvenile Marks, Side by Side
American Crow — Female
Corvus brachyrhynchos
- Identical to the male.
- Family groups cooperatively raise young.
- Gathers in huge winter roosts.
Fish Crow — Female
Corvus ossifragus
- Identical to the male.
- Scavenges docks, beaches and marshes.
- Nasal calls are the reliable separator.
Part-by-Part Anatomy Breakdown
Plumage will not save you here — structure and voice will:
| Body Part | American Crow | Fish Crow |
|---|---|---|
| Plumage | Entirely black | Entirely black — essentially identical |
| Size | 17.5 in; bulkier | 14–16 in; about a third lighter |
| Bill | Stout, heavier | Slightly smaller, more tapered |
| Wingbeats | Steady, deliberate | Quicker, snappier |
| Tail | Squared fan | Squared fan; subtly more rounded at the corners |
| Voice | Clear “caw-caw-caw” | Nasal two-note “uh-uh” or “cah-ah” |
| Habitat | Everywhere | Tide lines, riverbanks, marshes — and parking lots near water |
Song & Call Comparison
American Crow
Corvus brachyrhynchos
Voice: the familiar loud caw-caw-caw, plus rattles and imitations.
Behavior: mobbing calls assemble the neighborhood against owls and hawks.
American Crow voice • Wikimedia Commons
Fish Crow
Corvus ossifragus
Voice: a nasal, doubled uh-uh — like a crow saying “no”.
Clue: a “crow” giving thin nasal calls near the coast is a Fish Crow.
Fish Crow voice • Wikimedia Commons
Range & Seasonal Presence
The American Crow occupies nearly the whole continent — every state, city, farm and woodlot.
The Fish Crow is a bird of the Southeast: the Atlantic and Gulf coasts plus major river valleys, and it has been expanding steadily inland and northward up the Mississippi and Atlantic drainages. Where the two overlap, mixed flocks are routine — and every silent crow in the flock stays anonymous.
Feeder Behavior & Favorite Foods
- American Crow: visits platforms and lawns for cracked corn, peanuts, eggs and scraps on a learned schedule.
- Fish Crow: takes the same foods but is more strongly tied to water — it patrols shorelines for carrion and crabs, raids nests, and works parking-lot dumpsters near the coast.
- Best foods: both take corn, peanuts, eggs and meat scraps on open platforms or the ground.
- Flock clue: in the Southeast, winter crow flocks near water are often mostly Fish Crows — listen before you log them.
Temperament & Flock Behavior
American Crows are deliberate, wary and highly social, with family groups that cooperate to raise young.
Fish Crows are quicker, more gregarious and more opportunistic — big loose flocks swirl over roosts and feeding sites, and the birds bicker constantly in their nasal voices.
6-Step Backyard ID Checklist
- Listen. Nasal two-note “uh-uh” = Fish Crow; clear “caw” = American Crow.
- Ask the bird. Fish Crows often answer playback or scolding with their telltale nasal notes within seconds.
- Judge size against a known crow. Noticeably smaller with a smaller bill = likely Fish Crow.
- Watch the wingbeats. Quicker, snappier rowing = Fish Crow; steady deep beats = American Crow.
- Check the map. Deep inland North = American; Atlantic-Gulf coast and river valleys = both.
- Accept “crow sp.” A silent crow in the overlap zone simply cannot be identified — even experts log them as unidentified.
Frequently Asked Questions
How do you tell a Fish Crow from an American Crow?
By voice. The Fish Crow gives a nasal, abrupt two-note “uh-uh” or “cah-ah”; the American Crow gives the familiar clear “caw”. Fish Crows average smaller with smaller bills, but size overlap makes voice the only truly reliable mark.
Where do Fish Crows live?
Along the Atlantic and Gulf coasts and up the major river valleys of the Southeast — and they are expanding inland and northward. American Crows live nearly everywhere in North America.
Do Fish Crows only eat fish?
No — the name is misleading. They eat carrion, crabs, insects, eggs, nestlings, grain and human scraps along shorelines and parking lots, much like American Crows with a stronger tie to water.
Why do Fish Crows say “uh-uh”?
Their most diagnostic call is a nasal two-note “uh-uh” or “cah-ah”, often given in response to other crows. Birders joke it sounds like the bird is saying “no-no” — and that denial is the fastest way to identify one.
Can silent crows be identified to species?
Usually not in the overlap zone. Plumage is essentially identical and size overlaps, so birders record silent birds as “crow sp.” until one calls.
Do the two crow species flock together?
Yes, routinely. Mixed flocks feed and roost together across the Southeast, which is why listening to a whole flock matters — the nasal notes reveal the Fish Crows hidden inside it.
Key Takeaways
- Voice Rules: Nasal “uh-uh” = Fish Crow; clear “caw” = American Crow.
- Size: Fish Crow averages smaller — useful only side by side.
- Range: Southeast coasts and river valleys = both; deep inland = American.
- Habitat: Fish Crows hug shorelines, marshes and riverside parking lots.
- Mixed Flocks: Listen through every Southeast crow flock for the nasal notes.
- Honest Rule: A silent crow in the overlap zone stays “crow sp.”.