According to a new study, the first louse to take up residence on a mammalian host likely started out as a parasite of birds. That host-jumping event tens of millions of years ago began the long ...

A George Mason University (GMU) biologist proposed an alternate theory of how the common cuckoo bird mimics other birds’ egg colorings at a biology department seminar Jan. 15. Hanley said cuckoos are ...

Females often choose their mates, instead of mating at random, even when a father contributes nothing but genes to his offspring. Costly female preferences for males with exaggerated traits that ...

Gene flow and the genetic structure of host and parasite populations are critical to the coevolutionary process, including the conditions under which antagonistic coevolution favors sexual ...

Stay and fight, or flee? These are usually the alternatives facing a victim when it is attacked by an enemy. Two researchers from Lund University have now collected and discussed various examples from ...