By posing for us, are these red-billed oxpeckers imposing on the impala? Well, science hasn"t quite decided on this one. The relationship between parasite-eating birds and hoofed mammals was once considered a textbook example of mutualism, with oxpeckers cleaning up the ticks and fleas that bug the bigger beasts. Which is what we"d like to think is going on here.
Relationship status: It s complicated
Today in History
More Desktop Wallpapers:
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A cozy winter village
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National Mountain Climbing Day
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Papagayo Beach, Lanzarote, Canary Islands, Spain
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The Sonoran Desert, Arizona
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Cherry blossoms at the National Mall, Washington, DC
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There once was a lighthouse from...
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Here’s looking at you, teachers
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Pasadena Chalk Festival supports local arts education
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In search of roadside attractions on ‘America’s Highway’
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The moth wonderful time of the year
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Dunes at White Sands National Park, New Mexico
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Silbury Hill for International Archaeology Day
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Hoh Rain Forest, Olympic National Park, Washington
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It s Census Day—make it count
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Fallen but not forgotten
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Cinco de Mayo
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Bear cubs roughhouse on Siblings Day
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Channel Country, Australia
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World Otter Day
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National Park Week begins
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Pollinator Week
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American bison
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White Sands National Park turns 90
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Salt ponds of Maras, Peru
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Find a Rainbow Day
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Native American Heritage Day
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National Park Week: Yosemite National Park, California
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International Lighthouse and Lightship Weekend
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Art over Amalfi
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Polar bear capital of the world
Bing Wallpaper Gallery

