THE ANIMAL FILES

Eurasian jay

Garrulus glandarius

An autumn acorn can become a winter meal.

Eurasian jays carry and bury acorns, storing food for later seasons. Their pinkish-brown plumage includes a blue barred wing panel and a white rump. Woodland cover and oak resources shape where these colourful corvids are encountered.[1]

Follow the evidence ↓
Eurasian jay
Image: Luc Viatour · Commons · CC BY-SA 3.0
The wing flash
A barred blue panel marks the wing.[1][2]
A buried reserve
Acorn caching intensifies in autumn.[1]
Moving out from cover
Autumn oak searches can take birds into the open.[3]

The wing flash

The brownish body contrasts with a white rump, black moustache-like markings and a blue panel crossed by dark bars. These features can be visible in a brief flight between trees. The bird belongs to the crow family despite its colourful rather than all-black plumage.[1][2]

A buried reserve

Jays cache acorns and beechnuts for winter and spring, with autumn a particularly active period. Their diet also includes invertebrates, fruit, eggs and small animals.[1]

Moving out from cover

Normally secretive in woodland, jays become easier to see while seeking autumn acorns. They use deciduous and coniferous woods, parks and mature gardens, and may cross open ground in search of oak trees.[3]

A COMMON MIX-UP

Does colourful plumage exclude a bird from the crow family?

No. NCBI places the Eurasian jay in Corvidae.[2]

TRY A LITTLE REASONING

How can autumn food be useful months after it falls?

Reveal the explanation

Jays cache acorns and later retrieve those reserves, separating collection from consumption.[1]

Sources & editorial notes

Adapted and translated from the cited Wikipedia revisions, with source-linked reasoning. Image credit and licence are listed separately above.

Adapted and translated from Wikipedia contributors; exact revisions are linked below. CC BY-SA 4.0

  1. Wikipedia contributors — Eurasian jay (cited revision)
  2. NCBI Taxonomy — Garrulus glandarius
  3. RSPB — Jay, Garrulus glandarius

Last fact check:

One discovery leads to another

Blue jayBlue feathers can be blue without blue pigment.Cyanocitta cristata ↗Western jackdawA pair can stay together inside a much larger flock.Coloeus monedula ↗Eurasian magpieA stick dome shelters more than a black-and-white bird.Pica pica ↗