Subject: [Tweeters] evolutionary arms race, playing fetch with a sea-eagle,
Date: Aug 5 12:22:04 2008
From: Devorah Bennu - birdologist at yahoo.com


Hello everyone,

here's an interesting story about Horsfield's bronze-cuckoos, a brood parasite whose chicks are capable of imitating the begging calls of several species of birds that they parasitize -- without ever having heard these calls first. How do they do it?

http://scienceblogs.com/grrlscientist/2008/08/the_escalating_coevolutionary.php

and here's a video of a man whose white-tailed sea-eagle likes to play fetch with a tennis ball;

http://scienceblogs.com/grrlscientist/2008/08/would_you_like_to_play_fetch_w.php

and this is the first of seven images of american avocets, thanks to Joseph kennedy;

http://scienceblogs.com/grrlscientist/2008/08/american_avocets_1.php

cheers,

GrrlScientist
Devorah
http://scienceblogs.com/grrlscientist/
Roosting high up a tree somewhere in Central Park, NYC