Cooper's Hawk vs. Sharp-shinned Hawk: The Hardest Backyard ID

If a hawk just scattered every bird from your feeder, it was probably an accipiter — a forest hawk built to chase songbirds. The two common backyard species, Cooper's and Sharp-shinned, are so similar that even expert birders sometimes log them as “accipiter sp.” Here's how to push the ID as far as it will go.

Head and neck

This is the most reliable mark. Cooper's Hawk has a larger, blockier head that projects well past the wrists in flight — it looks like it's leading with its chin. Sharp-shinned Hawk has a small, rounded head that barely projects, often described as “a tennis ball on a stick.”

Tail shape

• Cooper's: rounded tail tip with a broad white terminal band; the outer tail feathers are shorter than the central ones.
• Sharp-shinned: square or even notched tail tip with a narrow, often frayed-looking white band.

Size and proportions

Cooper's is bigger — crow-sized — with a tubular body. Sharp-shinned is smaller, jay- to pigeon-sized, with a chesty, short look. But beware: female Sharp-shinneds approach male Cooper's in size, so never rely on size alone.

Flight style

Sharp-shinned has a buoyant, flicking flap and looks like it's being tossed by the wind. Cooper's has stiffer, more deliberate wingbeats and a steadier glide. Both flap-flap-glide between trees.

When to call it 'accipiter sp.'

If you only got a two-second look and none of the marks lined up, it's perfectly respectable to leave it unidentified. When you do get a photo, Birder AI will give you ranked candidates and the features behind them — a great way to learn which marks actually clinched the ID.