U.S. Fish And Wildlife Service

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Amazing photos taken in 2011 by Geoff Walsh, and posted by the U.S. Fish and Wildlife Service on Tuesday, show an otter making a meal out of an alligator at Florida's Lake Woodruff National Wildlife Refuge. (Geoff Walsh)

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This undated photo provided by the U.S. Fish and Wildlife Service shows Modoc suckers, found only in desert creeks of southern Oregon and Northern California. The service has proposed taking the tiny fish off the endangered species list, saying it has recovered enough to no longer need protection. The U.S. Fish and Wildlife Service said the Modoc sucker no longer is in danger of extinction, after nearly 30 years of recovery efforts, Wednesday, Feb. 12, 2014. (AP Photo/U.S. Fish and Wildlife Service)

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This undated photo provided by the U.S. Fish and Wildlife Service shows a Modoc sucker, found only in desert creeks of southern Oregon and Northern California. The service has proposed taking the tiny fish off the endangered species list, saying it has recovered enough to no longer need protection. Recovery efforts have focused on stopping overgrazing on public and private lands and fencing livestock out of creeks. (AP Photo/U.S. Fish and Wildlife Service)

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FILE - This April 18, 2008, file photo provided by the U.S. Fish and Wildlife shows a gray wolf. A scientific review says the U.S. government’s bid to lift federal protections for gray wolves across most of the Lower 48 states is based on unproven claims about their genetics. The U.S. Fish and Wildlife Service peer review panel released its report Friday Feb. 7, 2014. It represents a significant setback for the pending proposal to take gray wolves off the endangered species list except in the desert Southwest. (AP Photo/U.S. Fish and Wildlife Service, Gary Kramer, File)

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File-This undated file image provided by the U.S. Fish and Wildlife Service shows a Mexican gray wolf leaving cover at the Seviellta National Wildlife Refuge, north of Soccorro, N. M. There are more Mexican gray wolves in the wild in the New Mexico and Arizona than last year. The results of the U.S. Fish and Wildlife Service's annual survey were released Friday Jan. 31, 2014. There are at least 83 of the endangered predators in the two states, marking the fourth year in a row the population has increased. (AP Photo/U.S. Fish and Wildlife Service, Jim Clark, File)

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In this Jan. 5, 2003, photo released by U.S. Fish and Wildlife Service shows a black rhino male and calf in Mkuze, South Africa. Hunt the black rhino to save the black rhino. That's the Dallas Safari Club's approach to a fundraiser for efforts to protect the endangered species. The group hopes to raise more than $200,000 Saturday by auctioning off the right to shoot and kill a black rhinoceros in the African nation of Namibia. (AP Photo/U.S. Fish and Wildlife Service, Karl Stromayer, File)

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**FILE** The 2005-2006 Federal Junior Duck Stamp, designed by Kerissa Nelson, 17, of Grantsburg, Wis., is displayed on Capitol Hill in Washington on June 30, 2005, during the U.S. Fish and Wildlife Service's first day of sale ceremony. (Associated Press)

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**FILE** The 2005-2006 Federal Duck Stamp designed by Mark Anderson of Sioux Falls, S.D., is displayed on Capitol Hill in Washington on June 30, 2005, during the U.S. Fish and Wildlife Service's first day of sale for the 2005-2006 Federal Duck Stamp. (Associated Press)

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This undated image provided by the U.S. Fish and Wildlife Service shows a Casey's June beetle. (Associated Press/USFWS)

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In this March 2, 2010 photo provided by U.S. Fish and Wildlife Service biologist Susi von Oettingen bats are seen in a bunker in New Hampshire. Oettingen is part of a team that will study the habitat of the bats over the winter. (AP Photo/U.S. Fish and Wildlife Service, Susi von Oettingen)