Nature's little jewels. Hummingbirds are the smallest of North American birds, all with long slender bills adapted for reaching deep into tubular flowers Wingbeat is so rapid it produces a humming sound. All species feed while hovering and can also fly backward. Throat feathes look black when light does not reflect the brilliant iridescent colors. Young birds resemble females; some are difficult to identify. All are fearless and pugnacious, Males have a "pendulum" courting flight with distinctive patterms for some species Migrate by day, flying low. Eggs, 2, are small, white. Few have a song however, most all have a rapid squeaky chipping [or a clicking] sound.