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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Westerheversand Lighthouse
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National Aviation Day
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Knuthöjdsmossen, a nature reserve in Sweden
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World Jellyfish Day
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International Literacy Day
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The dancing trees of Sumba Island
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World Art Day
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The Lena Delta Wildlife Reserve in Siberia, Russia
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Bidding summer adieu
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Life in a North African town
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Red deer stag in Glen Affric, Scottish Highlands
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It’s World Migratory Bird Day
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The Easter Bunny’s story
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Apple Tree Day
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Aerial view of the Colorado River Delta in Mexico
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50 years of the Endangered Species Act
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Sharp-dressed bug
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Kochia, Hitachi, Ibaraki prefecture, Japan
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Tigh Mor Trossachs on Loch Achray, Scotland
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Spring equinox
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Belize Barrier Reef
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Santorini, Greece
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Headed to the High Country
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Hungarian Parliament Building, Budapest, Hungary
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World Lizard Day
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A national icon
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We have liftoff!
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Golden larches and Prusik Peak, the Enchantments, Washington
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Opt outside today
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World Oceans Day
Bing Wallpaper Gallery

