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  • All fields: males
(165 results)



Display: 20

    • Wood bison

    • Mammals; Endangered and/or Threatened species;
    • Wood bison are the largest native land mammals in the Western Hemisphere, 10 to 15% heavier than plains bison. Bulls are slightly larger than cows and average around 1,800 pounds, but can get up to 2,000 pounds. Both males and females have short...
    • Brown pelican: Pelecanus occidentalis

    • Endangered and/or threatened; Marine birds;
    • Wildlife fact sheet about brown pelicans. The brown pelican, also called American brown pelican or common pelican, inhabits the Atlantic, Pacific, and Gulf Coasts of North and South America.
    • Columbian White-Tailed Deer

    • Endangered and/or Threatened species;
    • White-tailed deer are generally distinguished from mule or black-tailed deer by their longer tail that is brown rather than black on the dorsal surface, a smaller metatarsal gland, and, in adult males, antlers with prongs arising from a single main...
    • Columbian White-Tailed Deer - Buck

    • Endangered and/or Threatened species;
    • White-tailed deer are generally distinguished from mule or black-tailed deer by their longer tail that is brown rather than black on the dorsal surface, a smaller metatarsal gland, and, in adult males, antlers with prongs arising from a single main...
    • Columbian White-Tailed Buck

    • Endangered and/or Threatened species;
    • White-tailed deer are generally distinguished from mule or black-tailed deer by their longer tail that is brown rather than black on the dorsal surface, a smaller metatarsal gland, and, in adult males, antlers with prongs arising from a single main...
    • Age, growth, sex composition, and maturity of white bass in Bull Shoals Reservoir

    • Document; Fisheries management; Fishes; Lakes; Rivers and streams; Biologists (USFWS); Biological control;
    • White bass in Bull Shoals Reservoir were studied from October 1963 through January 1966 to determine age, growth, sex composition, and maturity. Average calculated total length for males and females were calculated at the end of each year of life...
    • Waterfowl management handbook

    • Wildlife management; Waterfowl; Work of the Service; Wildlife refuges; Wildlife impacts;
    • Waterfowl nutritional needs during the annual cycle and the nutritional values of natural foods and crops are discussed.
    • Walt Crissey oral history transcript

    • History; Biography; Employees (USFWS); Surveying; Bird banding; Aircraft;
    • Walt Crissey oral history interview as conducted by Mark Madison. Walt Crissey flew over much of North America performing various waterfowl surveys.
    • Black-Footed Ferret

    • Endangered and/or Threatened species;Mammals;Partnerships
    • This photo was taken at the Black-Footed Ferret Recovery Program in Colorado. The black-footed ferret is considered to be the rarest mammal in North America. In 1988, the U.S. Fish & Wildlife Service developed the "Black-footed Ferret Recovery...
    • Black-footed Ferret  (captive)

    • Endangered and/or Threatened species;Mammals;Partnerships
    • This photo was taken at the Black-Footed Ferret Recovery Program in Colorado. The black-footed ferret is considered to be the rarest mammal in North America. In 1988, the U.S. Fish & Wildlife Service developed the "Black-footed Ferret Recovery...
    • Black-footed Ferret (captive)

    • Endangered and/or Threatened species;Mammals;Partnerships
    • This photo was taken at Black-Footed Ferret Recovery Program in Colorado. The black-footed ferret is considered to be the rarest mammal in North America. In 1988, the U.S. Fish & Wildlife Service developed the "Black-footed Ferret Recovery Plan"...
    • FWS Biologist Prepares Cages for Black-Footed Ferret

    • Endangered and/or Threatened species;Partnerships
    • This photo was taken at Black-Footed Ferret Recovery Program in Colorado. The black-footed ferret is considered to be the rarest mammal in North America. In 1988, the U.S. Fish & Wildlife Service developed the "Black-footed Ferret Recovery Plan"...

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