July 01, 2016
Acrobatic Activities by the Condor Chick
During periods when adults are absent, chicks mainly divide their time among spells of sitting alert, preening their feathers, and sleeping. Older chicks also spend lesser amounts of time picking up, manipulating, and sometimes ingesting objects such as sticks, feathers, stones, bones, and leaves.
They also exhibit mock prey-capture behavior with their feet, stabbing out to clamp objects to the substrate without gripping them. The presence of this behavior in chicks, but not adults, suggests that the ancestors of condors may have had at least partially predatory habits.