One of the great joys of spring is the first appearance of the tree swallows. In my yard, this event almost always occurs in the first week of April; this year was no exception. It was a close call, ...

This is a preview. Log in through your library . Abstract A new method to mark sperm transfer events between birds, using microspheres inserted into males' cloacae, was employed to assess the ...

The sweet chittering from the sky above me awakened memories so fond that I smiled brightly from within without looking up. I was doing yard work. My eyes and hands concentrated on removing an overly ...