April 22, 2010 -- the 40th Anniversary of Earth Day. On Earth Day, we're reminded to honor the earth and preserve the balance of nature. Few things remind us more of the fundamental need to conserve and enjoy nature than the voices of birds - the irreplaceable voices of birds. This Eastern…

Back in September, BirdNote began following a tiny Wilson's Warbler as it migrated south to the tropics. We visited the warbler again in December, on its wintering grounds on a shade-grown coffee farm in Belize. As April arrives, the sprightly bird is migrating northward, with males…

The evocative, booming voices of male Greater Prairie-Chickens displaying at dawn were once heard throughout the American Midwest. On its courtship lek, the male bird puffs out the great orange air-sacs at the side of its neck. He erects and flares his tail. His wings droop, but the neck…

It's March, and - following a winter sojourn in Mexico - thousands of fiery-orange male Rufous Hummingbirds are migrating northward, ahead of the females. Many pass through California on their way to breeding sites in the Northwest. To learn more about how to attract hummingbirds to your…

On Diamond Head on Oahu, Hawaii, on a vacant lot in the middle of an exclusive neighborhood, Wedge-tailed Shearwaters are nesting. The nesting success of shearwaters - including the Newell's Shearwaters seen here - has been greatly reduced on all of the main Hawaiian Islands. But Carolyn…

The American Dipper makes its living in the boulder-strewn rapids of mountain streams. The dipper starts to belt out its sprightly song while icicles still hang thickly from frozen waterfalls. John Muir wrote of this bird: "His music is that of the streams refined and spiritualized. The…

John Burroughs, one of the masters of American nature writing, wrote "The birds do indeed begin with the day. The farmer who is in the field at work while he can yet see stars catches their first matin hymns. In the longest June days the robin strikes up about half past three o'clock..."…

The sweet, bell-like tones of the Kauai O'o were heard for the last time nearly 20 years ago. The native birds of the Hawaiian Islands, like birds of many island groups, have been hard hit by changes wrought by humans. At least 90% of the bird species driven to extinction in recorded…

Three-quarters of Hawaii's native flowering plants probably come from seeds that hitched rides with birds. The bird-borne seeds that sprouted in Hawaii evolved into more than a thousand new species. The most likely seed-carriers were undoubtedly strong fliers, such as plovers or…

The Makahs tell a story about how the bird we know as the Steller's Jay - the bird the Makahs call Kwish-kwishee - got its crest. The mink, Kwahtie, tried to shoot his mother, the jay, with an arrow but missed. Her crest is ruffled to this day.