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  1. Gray wolf at the International Wolf Center, Ely, Minnesota
  2. A mountain goat descends a sheer rock wall to lick exposed salt
  3. A tawny frogmouth owl, Podargus strigoides, at the Fort Worth Zoo
  4. A bison, on a ranch near Valentine, Nebraska
  5. A common raven, Corvus corax principalis, at the Los Angeles Zoo
  6. A snowy egret, at the Lincoln Children's Zoo
  7. A non-irrigated field of corn near Bennet, Nebraska
  8. Wildflowers on coastal prairie, Eagle Lake, Texas
  9. Composite of 110 different species of ducks and geese
  10. A butte often painted by Georgia OKeeffe on her Ghost Ranch
  11. Portrait of a young pig in a snow dusted animal pen
  12. Monarch butterflies, Danaus plexippus, in the Sierra Chincua mountains
  13. Boston night aerial with time exposure car lights on Central Artery
  14. An oil rig silhouetted at sunset
  15. Brown cockroach, Periplaneta brunnea, at Western Kentucky University
  16. A silhouette of a herd of bison
  17. Monarch butterflies cover every inch of a tree in Sierra Chincua
  18. A red fox stands alert in short grasses
  19. A black bear perches on a rock watching for fish in Clayoquot Sound
  20. A clouded leopard, Neofelis nebulosa
  21. Leadore, Idaho
  22. A red barn on a homestead farm in Nebraska
  23. A monarch butterfly at the Lincoln Children's Zoo
  24. Close up of an African eagle ow, Animal Kingdom, Orlando, Florida
  25. An oil rig pumps oil from the Montana ground
  26. A green parakeet, Psittacara holochlorus strenuus, from a private collection
  27. Three wild burros standing in sagebrush
  28. Sandhill cranes silhouetted against a twilight sky, Nebraska
  29. A country road in Otoe county, Nebraska
  30. The eye and face of a veiled chameleon, Chamaeleo calyptratus
  31. A silhouette of a herd of bison
  32. Misty view of a gray wolf sitting near a tree, Yellowstone National Park, Wyoming
  33. The sun sets on the Nebraska Sandhills
  34. A lesser short-nosed fruit bat, at the Lubee Bat Conservancy
  35. An endangered Malayan tiger, Panthera tigris jacksoni
  36. A three-month-old baby chimpanzee
  37. Lightning fills the night sky near Walton
  38. Wild American bison roam on a game preserve in Kansas
  39. The paws of a grizzly bear, Ursus arctos horribilis
  40. A yellow bellied marmot, Marmota flaviventris, from a private collection
  41. A roseate spoonbill, Sabine National Wildlife Refuge, Florida
  42. A captive grey wolf, Canis lupus, in the snow
  43. A portrait of a bison on a ranch
  44. White tailed hawk, Geranoaetus albicaudatus, at the National Aviary of Colombia
  45. Platte River, Nebraska
  46. A federally threatened koala with her offspring, one of which is adopted
  47. Koi fish at the Taronga Zoo
  48. Parakeets or budgies