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Re: nest predation




On Fri, 29 May 1998, Pat Grant (Library: Serials Catalog wrote:
> If the unwilling
> foster parents had thrown out the alien egg, or otherwise failed to
> take care of the young parasite, the visiting absentee parents would
> trash the nest and kill any other young in it. 

Fascinating!  Therefore the cowbird is selecting for good parenthood in
another species, i.e., offspring with genes for parenting of cowbird young
will survive at a higher rate than those whose parents evict the
parasites.