 |
DESCRIPTION:
L=27" (69cm), WS=69" (175cm). Sexes similar. Overall black,
with pink head. In flight, wings show dark leading edge and lighter trailing
edge and wings are held up in a V pattern (different from most hawks and
eagles).
NATURAL HISTORY: Feeds on dead animals (carrion) found by both sight and
scent (unusual among birds). Vultures save energy by soaring, using upcurrents
of air (thermals) to stay aloft. They also save energy by lowering their
body temperature (torpor) at night
and then basking while perched (with wings outstretched ) to warm back
up in the morning. Their black plumage helps them absorb heat while basking
then helps keep them keep cooler (compared to white plumage) while soaring
during the hot day looking for carrion (see black
as adaptation). To cool themselves down when too hot, they urinate
on their unfeathered, blood vessel-filled legs, allowing for evaporative
cooling but staining their legs white. |