Steller's jay
A deep-blue mountain jay with a black crest and a loud voice, the campground bird that will eye your sandwich at Yosemite, Sequoia, and Crater Lake.
We saw it Our family spotted this one at Olympic National Park in July 2026.
Steller's jay at a glance
Cyanocitta stelleri STELL-erz jay; Cyanocitta stelleri is sy-an-oh-SIT-uh STELL-er-eye
- Type
- Bird · corvid
- Diet
- Omnivore
- Size
- About 12 inches from beak to tail, close to the length of a school ruler. Its head and crest are black and the rest of the body is deep blue.
- Lifespan
- Around 10 years in the wild, and some live longer.
- Conservation
- Least concern
Eats acorns, pine seeds, insects, berries, eggs, picnic scraps
A Steller's jay eats seeds, nuts, insects, and whatever people drop. It hides thousands of seeds and acorns to dig up later, and it is bold about grabbing food from a picnic table.
Should you worry?
A Steller's jay is harmless. The only trouble is that it is a bold thief. It will snatch chips or crackers right off a table. Keep your food packed away, because feeding jays human snacks is bad for them and teaches them to raid campsites.
A Steller’s jay is the loud blue bird at the edge of the picnic table. About a foot long, black on the head and crest and deep blue everywhere else, it lives in the mountain forests of the West, and at Yosemite or Crater Lake it is usually the first thing to notice you sit down with food. That blue is a trick of light: the feathers are built to scatter it, so the bird glows brighter in the sun.
Watch the crest and you can read the bird’s mood. The tall black feathers on its head stand straight up when the jay is excited or alarmed and lie flat when it is calm, a little flag that goes up and down all day. It is a corvid, the same clever family as crows and ravens, and among the smartest birds on the continent, smart enough to copy the scream of a red-tailed hawk, which sends smaller birds bolting so the jay can have the food to itself.
Most of what it eats is honest work: acorns, pine seeds, insects, and berries, and it hides thousands of seeds around the forest to dig up later. The trouble is the part that involves you. A Steller’s jay will lift a cracker or a chip off a table the moment your eyes are elsewhere, and a jay that learns to raid campgrounds is a jay eating the wrong food, so keep yours packed and let it go back to the acorns.
Did you know?
- The tall black crest on its head goes up and down like a mood flag. It stands up tall when the jay is excited or alarmed and lies flat when the bird is calm.
- Steller's jays can copy other sounds, including the scream of a red-tailed hawk. A fake hawk cry can scare other birds away from food the jay wants.
- Steller's jays are corvids, the same clever family as crows and ravens, and they are among the smartest birds in North America.
Common questions
Are Steller's jays dangerous to kids?
No. They are harmless, just bold. A jay may swoop in to steal a snack, so keep your food packed and do not feed it.
Why is the jay so blue?
Its feathers are built to scatter light so they look bright blue. The head and crest stay black, and the body glows deep blue in the sun.
What do Steller's jays eat?
Acorns, pine seeds, insects, and berries, plus any food people leave out. They hide extra seeds to eat later.
What is that pointed thing on its head?
It is a crest, a bunch of feathers the jay can raise and lower. Up means excited or nervous, flat means calm.