Welcome back, little mountain bluebird. Although this bright fellow may be enduring the last of this year"s snow in Yellowstone National Park, his presence means winter will soon be ending. The bluebird is a symbol of happiness and a welcome sign of spring in many cultures. Soon other migratory birds will arrive in the Greater Yellowstone Ecosystem—an 18-million-acre tract that includes Grand Teton National Park and surrounding national forests. It"s the world"s largest intact ecosystem in the northern temperate zone. What exactly does that mean? Since wolves were reintroduced to Yellowstone 25 years ago, all the animal species that were first documented by European explorers can still be found here.
Hello, harbinger of spring
Today in History
More Desktop Wallpapers:
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Martin Luther King Jr. Day
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Avalanche Lake Trail at Adirondack High Peaks, New York
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An endless journey
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Camels at Jaisalmer, Rajasthan, India
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Wahclella Falls, Oregon
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A national icon
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New Years Eve in Rio de Janeiro, Brazil
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Polar Bear Week
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Spine-cheeked anemonefish in Milne Bay, Papua New Guinea
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Brown-throated three-toed sloth in cecropia tree, Costa Rica
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The Bahamas
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National Mushroom Month
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A bridge comes full circle
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Hiking the High Trestle Trail
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A hero for the 21st century
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Is that a buzzing sound?
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Composite image of a lunar eclipse
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Dusky eagle-owls, Pakistan
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Neuschwanstein and Hohenschwangau castles, Bavaria, Germany
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The puffin-rabbit connection
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Let the harvest begin
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Flag Day
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Are you older than this lake?
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Happy 300th, NOLA!
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All in a day s work
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Where do those colors come from?
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Hallstatt, Austria
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A city of bridges
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Heceta Head Light, Florence, Oregon
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National Hummingbird Day
Bing Wallpaper Gallery

