Woodhouse’s Scrub-Jay or Pinyon Jay?

Here's how to tell the difference

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Woodhouse’s Scrub-Jay

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Pinyon Jay

Woodhouse’s Scrub-Jay

Aphelocoma woodhouseii

Also known as: Woodhouse's Jay

General appearance

The Woodhouse’s scrub-jay stands roughly 11 1/2 inches tall, about the size of a crow. Sporting a slim build and a moderately long tail, this bird presents a blend of dull blue color on its head, wings, and tail with a grayer tone in the center of its back. Its underparts are mostly light gray, with a hint of a blue chest band that sets off its slightly paler throat. Its wings are broad and rounded, while its tail can appear long, rounded, and wedge-shaped.

Male vs female

The description provided does not indicate any significant differences in size, color, or markings between male and female Woodhouse’s scrub-jays. Both genders appear to share the same general physical attributes and coloration.

Juvenile

The description provided does not provide specific details regarding the appearance of juvenile Woodhouse’s scrub-jays. Generally, juveniles may show somewhat subdued coloring compared to adults until they reach maturity.

Size

10.6 - 12.2 in/2.5 - 3.5 oz

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How to tell the Woodhouse’s Scrub-Jay from the Pinyon Jay

Visual differences

Woodhouse's Scrub-Jay is about 11.5 inches long, with a slim build, moderately long wedge-shaped tail, and dull blue plumage mixed with gray on the back and light gray underparts. In contrast, the Pinyon Jay is stockier with a shorter, square-tipped tail and uniform dull blue coloration. The Scrub-Jay has a subtle blue chest band, whereas the Pinyon Jay lacks distinct markings. Notably, Pinyon Jays have a spike-like bill, unlike the more traditional jay beak of the Scrub-Jay. Both species are crow-sized.

Key differences and behavior

Woodhouse's Scrub-Jay (Aphelocoma woodhouseii) and Pinyon Jay (Gymnorhinus cyanocephalus) exhibit distinct behaviors. Woodhouse's Scrub-Jays are often found in isolated pairs within arid woodlands and adapt well to suburban areas. They are clever foragers, known for kleptoparasitism and utilizing mule deer for feeding. In contrast, Pinyon Jays form large, permanent flocks up to 500, residing in pinyon-juniper woods and expanding their range if food is scarce. They are also adept at remembering hidden food caches. Woodhouse's Scrub-Jays prefer acorns and a varied diet, while Pinyon Jays primarily eat pinyon seeds. In breeding, Woodhouse's Scrub-Jays are monogamous with solitary nesting, whereas Pinyon Jays breed communally, with courtship involving multiple males vying for a female.

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