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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 non-irrigated field of corn near Bennet, Nebraska
  7. A snowy egret, at the Lincoln Children's Zoo
  8. Composite of 110 different species of ducks and geese
  9. Monarch butterflies, Danaus plexippus, in the Sierra Chincua mountains
  10. Portrait of a young pig in a snow dusted animal pen
  11. A butte often painted by Georgia OKeeffe on her Ghost Ranch
  12. A silhouette of a herd of bison
  13. Wildflowers on coastal prairie, Eagle Lake, Texas
  14. Brown cockroach, Periplaneta brunnea, at Western Kentucky University
  15. A red fox stands alert in short grasses
  16. Boston night aerial with time exposure car lights on Central Artery
  17. A black bear perches on a rock watching for fish in Clayoquot Sound
  18. An oil rig silhouetted at sunset
  19. Monarch butterflies cover every inch of a tree in Sierra Chincua
  20. Leadore, Idaho
  21. A monarch butterfly at the Lincoln Children's Zoo
  22. A red barn on a homestead farm in Nebraska
  23. Wild American bison roam on a game preserve in Kansas
  24. An oil rig pumps oil from the Montana ground
  25. A silhouette of a herd of bison
  26. A clouded leopard, Neofelis nebulosa
  27. The sun sets on the Nebraska Sandhills
  28. Parakeets or budgies
  29. Close up of an African eagle ow, Animal Kingdom, Orlando, Florida
  30. Sandhill cranes silhouetted against a twilight sky, Nebraska
  31. A green parakeet, Psittacara holochlorus strenuus, from a private collection
  32. White tailed hawk, Geranoaetus albicaudatus, at the National Aviary of Colombia
  33. A captive grey wolf, Canis lupus, in the snow
  34. Gulf Coast Of Texas
  35. Platte River, Nebraska
  36. A country road in Otoe county, Nebraska
  37. A yellow bellied marmot, Marmota flaviventris, from a private collection
  38. A great egret, Ardea alba
  39. A portrait of a bison on a ranch
  40. The paws of a grizzly bear, Ursus arctos horribilis
  41. A silhouette of a herd of bison
  42. A lesser short-nosed fruit bat, at the Lubee Bat Conservancy
  43. Lightning fills the night sky near Walton
  44. The eye and face of a veiled chameleon, Chamaeleo calyptratus
  45. A roseate spoonbill, Sabine National Wildlife Refuge, Florida
  46. Misty view of a gray wolf sitting near a tree, Yellowstone National Park, Wyoming
  47. A three-month-old baby chimpanzee
  48. Green-cheeked conure, Pyrrhura molinae sordida