Tuesday, November 20, 2012

Sunday, November 18, 2012

How to prevent brood parasitism by cuckoos -- From the fb Evolution page

How to prevent brood parasitism by cuckoos : Teach your unhatched chicks a password -- The Horsfield's Bronze-Cuckoo, along with 40% of cuckoos is a brood parasite. They lay their eggs in the nests of another bird species, which will in turn often mistakenly raise the young cuckoo as their own. Research has explored the evolutionary arms race between cuckoos and their hosts for many years and has exposed an array of tactics each team uses to help their young win out, including cuckoos booting nest mates out & exploiting sensory biases in the host, hosts develop ways to detect foreign eggs & chicks, and both parasite & host changing the colour & pattern of their eggs. Now in a new study published in Current Biology, researchers from Flinders University in Australia have discovered yet anot...See More