In
early spring, while whooping cranes are still on the wintering
grounds, pairs whoop and do a showy dance as part of courtship.
A
crane wanting to bond or mate with another bird struts around
and shows off its beautiful plumage (feathers). It continues to
use "body language" to try to get the other bird's attention.
It ruffles its feathers, growls, tosses its head, and even stomps
its feet!
If the other crane is interested, it will mimic (copy) the first
crane's movements. Together, they make a sequence of loud calls
(whoops!) that lasts for 15 to 40 seconds. (Click
here to hear the whoops.) This helps the two birds bond and
release tension. Next, as they prepare to mate, they exuberantly
leap, bow, bob and weave, flap, run around, and throw sticks in
the air. During this dance, a crane can leap six to eight feet
in the air!
But
this isn't all just for show. The dancing actually affects
cranes' biology. It stimulates body chemicals called hormones,
which get the birds ready to create new life. |