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  • Dr. Steve Amstrup, USGS biologist weighing a large, male polar bear weighing 944 lbs.  on the Beaufort Sea ice pack.
    D124966.jpg
  • Denver Holt weighs a snowy owl (Bubo scandiacus) chick on the north slope of Brooks Range, Alaska.
    D178675.jpg
  • Dr. Steve Amstrup weighs a polar bear on the Beaufort Sea, Alaska.
    D171484.jpg
  • The polar bear team weighs a female polar bear. Arctic Ocean
    D228752.jpg
  • USGS biologist Dr. Steve Amstrup and assistant Karyn Rode attempt to lift a small 365 pound female polar bear on the Beaufort Sea ice pack.
    D125184.jpg
  • Geoff York, a USGS biologist, and Katrina Knott, research assistant, collecting data from a polar bear on the Beaufort Sea ice. They use a block and tackle to take weight measurments. Kaktovik, Alaska
    D123732.jpg
  • Geoff York, USGS biologist, and his assistant take weight measurements of a captured polar bear on the pack ice of the Beaufort Sea.
    D124412.jpg
  • Dr. Steve Amstrup, USGS biologist, weighing a large, male polar bear (Ursus maritimus) weighing 944 pouns on the Beaufort Sea ice pack. Kaktovik, Alaska.
    D124957.jpg
  • Dr. Steve Amstrup, USGS biologist, weighing a large, male polar bear (Ursus maritimus) weighing 944 pouns on the Beaufort Sea ice pack. Kaktovik, Alaska.
    D124965.jpg
  • Dr. Steve Amstrup, USGS biologist and assitant Kristin Simac, work at rolling over a large male polar bear weighing 944 lbs. Beaufort Sea ice pack.
    D124859.jpg
  • Dr. Steve Amstrup , USGS biologist, and Karyn Rode, field assitant, weighing a large male polar bear (Ursus maritimus) on the ice pack of the Beaufort Sea. Kaktovic, Alaska.
    D124605.jpg
  • Dr. Steve Amstrup, USGS biologist and assitant Kristin Simac, work at rolling over a large male polar bear weighing 944 lbs. Beaufort Sea ice pack.
    D124866.jpg
  • Dr. Steve Amstrup , USGS biologist, and Karyn Rode, field assitant, weighing a large male polar bear (Ursus maritimus) on the ice pack of the Beaufort Sea. Kaktovic, Alaska.
    D124604.jpg
  • Steve Amstrup, lead biologist for the USGS, uses a block and tackle device to weigh a large male polar bear (Ursus maritimus). He weighed 982 lbs. Kaktovik, Alaska.
    D123967.jpg
  • Snowy Owl, (Nyctea scandiaca) Denver Holt and Laura Phillips prepare to weigh female. Barrow, Alaska.
    00674-08905.jpg
  • Dr. Steve Amstrup, USGS biologist, and Daniel Cox use a weight bar to lift and weigh a small, 365-pound female polar bear. Beaufort Sea
    D125192.jpg
  • Dr Amstrup and chopper pilot Bob Dunbar weigh a captured polar bear, Beaufort Sea, Alaska.
    D170163.jpg
  • Black Bear, (Ursus americanus) Minnesota, Dave Garshelis and Pam Coy weigh and measure cub for research data.
    00471-12917.jpg
  • Black Bear, (Ursus americanus) Minnesota, Dave Garshelis and Pam Coy weigh and measure cub for research data.
    00471-12915.jpg
  • Snowy Owl, (Nyctea scandiac) Denver Holt prepares to weigh chick. Barrow, Alaska.
    00674-09620.jpg
  • Dr Amstrup and Bob Dunbar weigh a polar bear out on the ice of the Beaufort Sea, Alaska.
    D171000.jpg
  • Black Bear, (Ursus americanus) Minnesota, D.W. Kuehn and Karen Noyce, DNR biologists, weigh drugged bear for data.
    00471-12707.jpg
  • Dr Steve Amstrup weighs a polar bear on the Beaufort Sea, Alaska
    D171488.jpg
  • Dr. Steve Amstrup, USGS biologist, weighs a large male polar bear (Ursus maritimus) on the Beaufort Sea ice pack. Kaktovik, Alaska.
    D125793.jpg

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