Many people have probably seen birds picking up small pieces of man-made materials, like strips of a plastic bag or paper litter, and taking them into their nest. This behavior appears to be fairly ...

Parasitic birds lay their eggs in the nests of other species to offload the expense of raising their young. It's very economical! However, this puts an undue burden on the host birds, whose own ...

Add Popular Science (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results.