Every raven you meet will be accused of being a crow, and every large crow of being a raven. The confusion is fair: both are corvids, both are black to the feather, and both are watching you more carefully than you are watching them. But the differences are real, and you only need four of them.
Are ravens and crows the same bird?
No. Ravens and crows belong to the same genus, Corvus, and to the corvid family, but they are different species. This guide compares the Common Raven (Corvus corax) with the American Crow (Corvus brachyrhynchos), the pair behind most North American crow-or-raven questions. Other Corvus species vary, so location still matters.
How do you tell a raven from a crow?
- Size. A Common Raven averages about 27 inches (69 cm) long with a 46-inch (117 cm) wingspan. An American Crow averages about 20 inches (51 cm) long with a 36-inch (91 cm) wingspan. At a distance, use size together with the other clues below.
- Tail. The cleanest field mark. In flight, a raven's tail opens into a wedge — a diamond with a point. A crow's tail opens into an even fan, cut straight across.
- Voice. Crows caw — sharp, repeated, argumentative. Ravens croak: a deep, hollow gronk that sounds less like a bird and more like a door in an abandoned house.
- Flight. Crows flap — steady, purposeful, commuting — on broader, rounder-looking wings. Ravens soar, glide, tumble, and occasionally roll over in mid-air on longer, narrower wings with more pronounced fingers at the tips.
| Field mark | American Crow | Common Raven |
|---|---|---|
| Length | About 20 in (51 cm) | About 27 in (69 cm) |
| Wingspan | About 36 in (91 cm) | About 46 in (117 cm) |
| Tail in flight | Squared or slightly rounded fan | Tapered wedge or diamond |
| Bill | Moderate, usually shorter than the head | Heavy, often longer than the head |
| Wings | Broader, with shorter “fingers” | Longer and narrower, with longer “fingers” |
| Voice | Clear caw | Deep, gurgling croak |
These measurements and field marks follow the Cornell Lab of Ornithology's Bird Academy comparison. Size alone is unreliable at a distance; combine it with tail, voice, bill, and wing shape.
Supporting evidence: the raven carries a heavier, more curved bill and a ruff of shaggy throat feathers, like a bird wearing an old collar. And crows keep company — family groups, winter roosts, the occasional murder — while breeding ravens often travel in territorial pairs. Young and nonbreeding ravens may still gather where food is plentiful.
How can you tell a raven from a crow by the tail?
The tail is the mark to trust when the bird is too far off to size up, and it only shows itself in flight. A raven's tail feathers are graduated: the central pair is longest and the outer ones shortest, so the spread tail comes to a point down the middle. Field guides call it a wedge; from below it reads as a blunt diamond. A crow's tail feathers run close to equal length, so the spread tail opens as a square-ended fan with a straight trailing edge.
Perched, both birds look like a folded black tail and tell you nothing at all. Wait for the bird to fly and bank. In a photograph the same rule works: find a frame where the tail is fanned, then look only at the trailing edge. Straight across, crow. Coming to a point, raven.
Both are alarmingly clever
Intelligence will not help you tell them apart, because both are near the top of the class. Crows recognise individual human faces and hold the grudge for years — at least 2.7 of them, in the study that measured it. Ravens in cognition experiments plan for future events and barter for tools — behaviour once considered strictly human territory. Whichever bird is watching you from the wire, assume it is taking notes.
What the folklore says
This part is belief, not biology. The raven got the senior mythological posting: Odin kept two of them, Huginn and Muninn — Thought and Memory — who flew out over the world each day and reported back. In Irish myth the Mórrígan, goddess of war and fate, appears in raven form over battlefields. And an English tradition holds that if the ravens ever leave the Tower of London, the kingdom falls — which is why the Tower still employs a Ravenmaster to make sure they stay.
The crow, meanwhile, collected the street-level folklore: omens, counting rhymes, and the persistent old story that crows hold court over their own — a legend we have examined separately, alongside what crows actually do around their dead.
From the archive
Both birds are documented in the archive: the raven keeps its post on The Raven Familiar, the crows assemble on Murder of Crows, and the complete corvid file lives among the Crow and Raven Shirts. Their older omens remain in Folklore.
Sources
- Cornell Lab of Ornithology Bird Academy, “Crows and Ravens” identification comparison
- Cornell Lab of Ornithology, Common Raven identification
- Cornell Lab of Ornithology, American Crow identification
- Marzluff et al., “Lasting recognition of threatening people by wild American crows”, Animal Behaviour (2010)
- Kabadayi & Osvath, “Ravens parallel great apes in flexible planning for tool-use and bartering”, Science (2017)