Backyard bird watching

[Raven]

Originally Posted by chrisjoe13

One of the PBS guys is the one that said if you remove their eggs, they destroy. still havent taken them out, but want to.

THEN PERFORATE THEM

[FishermanTim]

I'd remove the eggs, and if the cowbird desides to destroy the nest, the results are the same except there will be 2 less cowbirds.

Personally, I doubt that the cowbird which has already abandoned the egg and doesn't do any of the feeding, would be watching the nest to make sure her eggs hatch.
If it were true, it would be really strange.