What’s more, when the wings are closed, the feathers that are most important for flight are folded under the others, protected against wear and tear as the bird moves around in foliage or grass.

Chickens treated to inhibit the sonic hedgehog (Shh) pathway during development grow feathers that resemble ancient ...

On perched bird, wing patch shows only as a thin white line along the leading edge of the folded wing. Adult male: grayish or grayish brown head and neck, with neck and breast washed lightly with ...

Adult: brown above with lighter feather edges and ... in flight shows more pointed wings. Juveniles are similar, but red-shouldered shows 3 bands on the folded secondaries; broad-winged lacks ...