Bighorn Sheep

The bighorn sheep eats grass and other plant organisms. If it was not included in Yosemite's ecosystem, the plant life would grow rapidly. The mountain lion is a predator of the bighorn sheep. If the bighorn sheep was not included in the ecosystem the mountain lion would not be able to survive.

  • Bighorn sheep have two large, rounded horns on the top of their head

  • Bighorn sheep range in color from light brown to very dark brown

  • Bighorn sheep males, rams, weigh anywhere from 125 pounds up to 320 pounds

  • Bighorn sheep females, ewes, weigh anywhere from 75 pounds up to 190 pounds

  • The horns of bighorn sheep contrast as ewes' horns are much smaller and don't curve as much as the horns of a ram


Mountain Lions

The mountain lion eats mostly bighorn sheep and other mammals. If it was not included in Yosemite's ecosystem, the population of bighorn sheep would start to increase. Black bear is a predator to mountain lions. If mountain lions did not exist in Yosemite's ecosystem, the black bear population would have less food and would become more endangered.

  • Mountain lions vary in color from grey to reddish grey

  • Mountain lions have a very powerful neck and jaw

  • Mountain lions are generally about 2 feet tall and about 8 feet long from its nose to its tail

  • Mountain lion males weigh anywhere from 110 pounds up to 220 pounds

  • Mountain lion females weigh anywhere from 65 pounds up to 140 pounds

  • Mountain lions can jump up 20 to 40 feet in the air from the standing position

Endangered Species List

  • Bighorn Sheep (in 2000 they were put as endangered) Taking down hunting levels.
  • Black Bears (in 1922 they were put as endangered) Putting out awarenesses about the conservation of black bears.
  • Sierra Nevada Red Fox (in 1990 they were put as endangered) The local rangers are giving the species food so the sierra nevada red fox can survive.
  • Wolverine (in 1920 they were put as endangered) The wolverines are wearing collars so the park rangers know how many are still there so they don't become extinct.
  • Sierra Frogs (in 2004 they were put as endangered) The sierra frog population is slowly becoming extinct due to climate changes that are harming their habitats so rangers are trying to save their environment.
  • Yosemite Toads (in 2004 they were put as endangered) There are some notices around Yosemite that tell visitors not to touch or harm any of the yosemite frogs.
  • Yellow-Legged Frogs (in 2006 they were put as endangered) The yellow-legged frogs are being treated for diseases.
  • Great Grey Owls (in 1973 they were put as endangered) The great gray owls are under close watch by park officials.
  • American Peregrine Falcons (in 2000 they were put as endangered) The american peregrine falcons are carefully watched and protected by park officials.
  • Golden Eagle (in 1993 they were put as endangered) There are notices put up around Yosemite to leave any golden eagles alone.