Feather Identifier app iconFeather Identifier
Blue Jay
Tail feather (Rectrix)

Blue Jay

Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Passeriformes, Family: Corvidae, Genus: Cyanocitta, Species: C. cristata

Family: Corvidae (Crows, Jays, and Magpies)

Shape
Relatively symmetrical, elongated, with a rounded to slightly tapered tip.
Size
Estimated 5.5 to 7.0 inches (14-18 cm) in length; width approximately 1 inch at widest point.
Rarity
Very Common; one of the most recognizable and widespread birds in Eastern North America.
Learn more about Blue Jay in the encyclopedia →

Found a feather like this?

Identify any feather from a photo, free.

Identify a feather

Description

A striking tail feather from a large songbird known for its bright blue plumage and crest. Blue Jays are vocal, intelligent birds that measure about 9-12 inches with a 13-17 inch wingspan. They are famous for their mimicry and bold behavior around bird feeders.

Colour & Pattern

Boldly patterned with alternating black bars (banding) over a blue to periwinkle ground color; the distal end features a prominent, clean white tip; ventral side is lighter and more matte.

Barb Structure

Mostly pennaceous and tightly interlocked; small plumulaceous section at the very base (the calamus/umbilicus).

Texture & Surface

Smooth, stiff, and slightly glossy on the dorsal surface; the blue is structural (not pigment-based) and appears vivid under direct light.

Key Features

Distinctive black horizontal barring on a blue background followed by a broad white terminal band; structural blue coloration that disappears in backlight.

Habitat

Deciduous and mixed forests, woodlots, residential gardens, and urban parks with mature trees.

Geographic Range

Eastern and central United States and southern Canada; year-round resident in most of its range, with some northern populations migrating south.

Ecological Role

Important seed dispersers (especially for oak acorns); also act as neighborhood 'sentinels' that alarm-call to warn other birds of predators like hawks.

Similar Species

Steller's Jay (lacks the broad white tips), Blue-and-white Mockingbird (different barring/blue tone), or other Corvids like Magpies (gradient rather than crisp bars).

Interesting Facts

The blue in this feather is a structural color caused by light scattering (Tyndall scattering) through the microscopic structure of the barbs; if you crush the feather, the blue disappears.

Condition Notes

Good condition; minor ruffling of the barbs near the base; no significant fault bars or parasitic damage visible.