Blue Jay
Cyanocitta cristata
Quick answer
The blue jay is a striking, intelligent songbird of eastern and central North America, known for its blue crest, black necklace markings, and loud, varied calls. A member of the crow family, it is bold, social, and clever, famous for caching acorns and for mimicking the screams of hawks. Blue jays commonly live about 7 years in the wild.
Blue Jay facts at a glance
| Scientific name | Cyanocitta cristata |
|---|---|
| Diet | Omnivore (acorns, seeds, insects, eggs) |
| Habitat | Forests, woodlands, parks, and gardens |
| Lifespan | About 7 years in the wild |
| Length | 25–30 cm (10–12 in) |
| Top speed | Up to 40 km/h (25 mph) |
| Conservation status | Least Concern (IUCN) |
| Kingdom | Animalia |
|---|---|
| Phylum | Chordata |
| Class | Aves |
| Order | Passeriformes |
| Family | Corvidae |
| Genus | Cyanocitta |
Where it lives
Forests, woodlands, parks, and gardens across eastern and central North America.
Color and the trick of blue
The blue jay's blue is not made by pigment but by the microscopic structure of its feathers, which scatters light to appear blue, an effect called structural color. A crushed blue feather looks dull brown because the structure is destroyed. The bird's blue crest, white face, and black collar make it one of North America's most recognizable songbirds.
Intelligence and acorns
As members of the crow family, blue jays are highly intelligent and curious. They gather and bury thousands of acorns each autumn, and the ones they never retrieve grow into oak trees, so blue jays help spread and plant forests. They are also known to use tools and to remember rich food sources over long periods.
Calls and mimicry
Blue jays are loud and have a wide range of calls. They are skilled mimics and often imitate the screams of hawks, which may warn other jays of danger or may scare other birds away from a feeder. They also make soft, musical notes among themselves that are very different from their familiar harsh "jay-jay" call.
Habitat and behavior
Blue jays live across eastern and central North America in forests, woodlands, parks, and gardens, and are common at backyard feeders. They are social and often travel in family groups, and they can be bold and assertive, sometimes driving smaller birds away from food while keeping a sharp lookout for predators.
Frequently asked questions about the Blue Jay
Why are blue jays blue?
Blue jays are not blue because of pigment. Tiny structures in their feathers scatter light to create a blue appearance, so a crushed feather actually looks brown once that structure is broken.
What do blue jays eat?
Blue jays are omnivores that eat acorns, nuts, seeds, fruit, and insects, and sometimes eggs or nestlings. Acorns are a favorite, and the jays bury many for winter.
Do blue jays really help plant trees?
Yes. Blue jays bury thousands of acorns each autumn and never recover them all. Many of the forgotten acorns sprout, so blue jays play a real role in spreading and planting oak forests.
Why do blue jays imitate hawks?
Blue jays often mimic hawk screams. This may warn other jays that a predator is near, or it may startle other birds away from a feeder so the jay can eat undisturbed.
Are blue jays aggressive?
Blue jays can be bold and assertive, sometimes chasing smaller birds from feeders and mobbing predators near their nests, but they are also social and cooperative within their own family groups.
How long do blue jays live?
Blue jays commonly live about 7 years in the wild, and some banded individuals have survived well over 15 years.
