19 of the world's greatest nature photos

French photographer <a target="_blank" href="http://www.lucnix.be/">Luc Viatour</a> captured a quiet moment on the Spanish island of Lanzarote, the easternmost island of the Canary Islands in the Atlantic Ocean. (Luc Viatour/www.lucnix.be)

Visitors ride camels as sun rises in Dunhuang, Gansu province. (Reuters)

A still camera on a sound trigger captured this intriguing photo of an airborne frog as NASA's LADEE spacecraft lifts off from Wallops Flight Facility in Virginia. (NASA Wallops Flight Facility/Chris Perry)

NASA's Cassini spacecraft caught a rare image of Saturn's rings and planet Earth and its moon all in the same frame. This is only the third time ever that Earth has been captured on camera from the outer solar system. (European Space Agency)

Aurora borealis, or northern lights, fill the sky over Finnmark county, northern Norway. (Reuters)

On August 25, 2013, photographer Paul Donahue <a target="_blank" href="http://www.foxnews.com/science/2013/09/11/mick-jaguar-attacks-120-pound-crocodile-cousin-in-brazil/">received a call alerting him a large male jaguar</a> had been spotted prowling along the Tres Irmãos River in central Brazil. Upon arriving at the scene, Donahue watched the predator nicknamed Mick Jaguar stalk a 120-pound yacaré caiman, a kissing cousin of the crocodile native to South America. After 40 minutes of patient waiting, Mick Jaguar finally made his move and pounced on the unsuspecting massive caiman, <a target="_blank" href="http://news.nationalgeographic.com/news/2013/09/pictures/130906-caiman-jaguar-animals-science-photos-brazil-attack?source=sailthru#/4-jaguar-kills-caiman_71394_600x450.jpg">National Geographic reported</a>. (Paul Donahue/National Geographic)

Chameleons are a type of lizard consisting of approximately 160 species. (Luc Viatour/www.Lucnix.be)

This diverse group of sea animals all come equipped with stinging cells. (Luc Viatour/www.Lucnix.be)

Pigeons fly near Mount Sinabung as it spews ash and hot lava during an eruption near Simpang Empat village in Karo district, Indonesia's north Sumatra province, September 15, 2013. (Reuters)

Several photographs were auctioned off as part of the inaugural Green Auction on the 40th annual Earth Day. Here are some of the photos that were chosen by members of the International League of Conservation Photographers. For centuries polar bears have gathered along the Western shores of Hudson Bay during late October and early November waiting for the bay to freeze. Here at Cape Churchill the land extends far out into the bay and is one of the first places the bay begins to freeze. When the ice grows solid, the polar bears move out onto the ice where they will spend the winter hunting for their main diet of ringed and bearded seals. (Thomas D. Mangelsen/ Mangelsen Stock/iLCP Collection )

Morning Mist, Rock Island Bend, Franklin River, Southwest Tasmania, Australia. This iconic photo was instrumental in allowing the rivers to run free. First published in "The Australian Newspaper" prior to the 1983 Australian Federal Elections with the slogan,"Could you vote for a party that would destroy this?" The publication of the photo led to public outrage. (Peter Dombrovskis/iLCP Collection )

Its image mirrored in icy water, a polar bear travels submerged--a tactic often used to surprise prey. Scientists fear global warming could drive bears to extinction sometime this century. (Paul Nicklen/iLCP Collection)

Water lilies, Nymphaea nouchali, Okavango Delta, Botswana. The Okavango covers thousands of square miles, but it is really just a thin sheet of water stretched across the sands of the Kalahari. (Frans Lanting/iLCP Collection)

Split Rock and Cloud, Eastern Sierra, California, 1976 Galen Rowell. Galen Rowell (1940-2002) was a master of incorporating fleeting qualities of natural light in compelling compositions. He saw this splendidly illuminated cirrus cloud floating quickly on the wind while climbing one evening in the Buttermilk region of California's Eastern Sierra Nevada. (Galen Rowell/Mountain Light/iLCP Collection)

Petrified sand dunes and reflection, Paria Canyon - Vermilion Cliffs Wilderness, Arizona. Pulitzer-prize winning photojournalist and landscape photographer Jack Dykinga made this photograph as part of a campaign to create National Monuments in both the Paria Canyon and Escalante Canyon drainages.  (Jack Dykinga/iLCP Collection)

"The Galápagos Islands provide a window on time. In a geologic sense, the islands are young, yet they appear ancient. The largest animals native to this archipelago are giant tortoises, which can live for more than a century. These are the creatures that provided Darwin with the flash of imagination that led to his theory of evolution." - Frans Lanting. (Frans Lanting / Frans Lanting Photography/iLCP Collection)

Twilight of the Giants, Botswana 1989.African elephants at twilight, Loxodonta africana, Chobe National Park, Botswana. (Frans Lanting / Frans Lanting Photography/iLCP Collection)

Australian sea lions play in the sea grass beds off Little Hopkins Island, Australia. (David Doubilet/iLCP Collection)

Doomed by a gill net, a thresher shark in Mexico's Gulf of California is among an estimated 100 million sharks killed yearly for their fins. They add to the devastating global fish catch: nearly 100 million tons. (Brian Skerry/iLCP Collection)