Bluet Damselfly
Drake Mallard Ducks
Dragonfly
Song Sparrow
The Song Sparrow is found throughout most of North America, but the birds of different areas can look surprisingly different. Song sparrows of the Desert Southwest are pale, while those of the Pacific Northwest are dark and heavily streaked. Sparrows of Alaska's Aleutian Islands chain are even darker, and they're huge: one-third longer than the eastern birds and weighing twice as much.
Like many other songbirds, the male Song Sparrow uses its song to attract mates as well as defend its territory. Lab studies have shown that the females are attracted not just to the male's song itself, but to how well it reflects his ability to learn. Males that used more learned components in their songs and that better matched the songs of the adult bird they learned their songs from were preferred by the females.
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