Today"s photo brings us to the banks of Caño Cristales, the "liquid rainbow" that cuts a prismatic path through the heart of Colombia. From June through November, when the clear water is low, the abundant underwater plants that cover the riverbed show off their red, yellow, green, and blue hues. The star of the show—especially in this photo—is Macarenia clavigera, a riverweed that ranges from bright red to deep crimson or purple depending on its intake of sun rays. In August and September, when the florid flora is at its peak, the river"s a coveted nature excursion: Because the ecosystem is so fragile, visits are limited to guided tours.
Go with the rainbow flow
Today in History
More Desktop Wallpapers:
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Lake Tekapo, New Zealand
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Sandhill cranes, Bosque del Apache National Wildlife Refuge
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Waiting for winter
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Guild houses of Grand-Place, Brussels, Belgium
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Into the woods
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Greece celebrates its independence
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Happy Cousins Day!
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Celebrating the UN’s International Day of Families
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Travels to the Oregon deep
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Rock River Falls, Upper Peninsula, Michigan
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World Honey Bee Day
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Crimson-rumped toucanet in the Refugio Paz de Las Aves, Ecuador
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A picture-perfect day on Trillium
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Celebrating Flag Day: ‘O long may it wave’
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It s Computer Science Education Week
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Flamenco dancers
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Meandering through Patagonia
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Mardi Gras
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The Guggenheim Bilbao turns 25
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National Mushroom Month
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Basking in the glow
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International Mountain Day
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National Hummingbird Day
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Monteverde Cloud Forest Reserve in Costa Rica
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Memorial Day
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Paradise, found
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Celebrating the Day of the Dead
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Northern hawk-owl
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Birch trees, Drammen, Norway
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Polar bears
Bing Wallpaper Gallery

