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
Slightly asymmetrical, elongated, and tapered, typical of an outer or middle rectrix. The tip is rounded and shows light wear.
Size
Approximately 12–15 cm (4.7–5.9 inches) in length. This is consistent with the standard tail length of an adult Blue Jay.
Rarity
Very Common
Learn more about Blue Jay in the encyclopedia →

Found a feather like this?

Identify any feather from a photo, free.

Identify a feather

Description

This is a striking tail feather from a Blue Jay, a bold and intelligent songbird. The bird itself is medium-sized with a prominent crest, blue upperparts, and a white underbelly. Known for their loud 'jay-jay' calls and ability to mimic hawks, they are a staple of North American backyard birding.

Colour & Pattern

Brilliant cerulean to sky blue base color with distinct horizontal black bars (barring). The blue is a structural color caused by light scattering (schemochrome), not pigment. The underside is much duller and more grayish-white.

Barb Structure

Pennaceous and tightly interlocked throughout the majority of the vane for flight stability. The base exhibits a small amount of plumulaceous (downy) structure near the calamus.

Texture & Surface

Smooth, slightly stiff, and glossy on the dorsal side. The surface has a velvety appearance due to the microscopic structure that reflects blue light.

Key Features

Distinctive black barring over a vibrant blue background; structural coloration that disappears if the feather is crushed; white tipping (though less visible on this specific worn specimen).

Habitat

Mixed woodlands, deciduous forests, parks, residential areas, and gardens with mast-producing trees like oaks and beeches.

Geographic Range

Common year-round resident across eastern and central North America, from southern Canada down to Florida and eastern Texas. Some northern populations are migratory.

Ecological Role

Omnivorous predator and scavenger; important seed disperser for oak and beech trees. They act as 'sentinels,' alerting other birds to the presence of predators like hawks or cats.

Similar Species

Steller's Jay (darker blue, often lacks such distinct wide banding), Bluebird (much smaller, different shape), Florida Scrub-Jay (lacks the bold black barring).

Interesting Facts

The blue in a Blue Jay's feather isn't a pigment. If you crush the feather, the blue color disappears because the microscopic structure that scatters light is destroyed. They also frequently stash acorns in the ground, inadvertently planting thousands of oak trees.

Condition Notes

Fair to Good. There is significant fraying and separation of the barbs along the edges (vane splitting), likely due to natural wear or being handled after it was molted.

Blue Jay | Feather Identifier