New versions of the H5N1 virus are increasingly adept at spreading. Suggestions to either let it rip in poultry or vaccinate the birds could backfire.

Birders all over the world are fascinated by vagrants—birds that turn up in unexpected places, well outside their species’ normal ranges. Vagrancy can have many causes, from young birds getting lost ...

Birds do not touch the ground or any other object while on the wire, so there is no path for electricity to flow through them ...