Birds do it, beavers (and ducks, for that matter) do it and, although we have no idea whether educated fleas do it -- or how to determine how many years of school a flea has completed -- cute old ...

Anna’s hummingbird nests are so small that not even one parent can sit in it. Tacoma Nature Center Courtesy What do you think of when you hear “bird’s nest”? Most of us probably think of a cup-shaped ...