Forum > Birds In The News > Hoopoes' Eggs Show Their True Colors

Webmaster Posted 14-Aug-2014 12:39
Joined:

Posts:
06-Mar-2014

1379
From Science Daily and Guardian on 14-Aug-2014 12:39

Preen gland secretion causes hoopoes’ eggs to change color, possibly giving signals about the robustness of the mother bird, researchers have found. Hoopoe females use cosmetics on their eggs - and the eggs gradually change color when they are incubated, from bluish-grey to a more saturated greenish-brown. This happens because secretion from the uropygial or preen gland – a substance birds use to preen and protect their feathers – is transfered from the female hoopoe’s gland to her eggs directly with the bill and by means of belly feathers.


View Full Article

 
HawkOwl Web Design