Yellowstone Alphabet Book: UVWXYZ

A squirrel sits on its hind legs and peeks through short green grass at the camera.
Uinta ground squirrel

NPS / Neal Herbert

U is for Uinta Ground Squirrel

Uinta ground squirrels hibernate as early as mid-July through March—they spend most of their lives sleeping!

A small, grey mammal nestled among brown leaves.
Mountain vole


V is for Vole

The meadow vole is a little rodent that likes to hide in tunnels under grassy areas. They are probably the most important prey species in Yellowstone. Coyotes, raptors, grizzly bears, and other animals eat mountain voles.

A grey wolf howls on a large boulder covered by snow.

NPS / Jim Peaco

W is for Wolf

Wolves were reintroduced to Yellowstone in 1995. Wolves inhabit most of the park now and the Lamar Valley is one of the best places in the world to watch wild wolves.

Listen to wolves in our Sound Library.

A car stands next to water on a bank covered in fluffy snow
Canada lynx

Courtesy Fred Paulsen

X is for LynX

Although records suggest that Canada lynx have been present in the Greater Yellowstone Ecosystem since at least 1893, recent surveys indicate the species is now rare. Lynx look similar to bobcats, but have longer ear tuffs and a larger track.

A submerged view of a brightly colored fish
Yellowstone cutthroat trout

NPS / Jay Fleming

Y is for Yellowstone Cutthroat Trout

Yellowstone cutthroat trout is native to rivers in Yellowstone. They can only live in cold, clean water in streams or lakes. Many birds and mammals rely on this fish as a food source. They got the name cutthroat because of the bright red slash under their mouths.

Dark streaming masses in a shallow thermal pool with small rocks


Z is for Zygogonium

Tiny heat-loving organisms live in many of Yellowstone's thermal features. They thrive in the extremely environments. Zygogonium are in the same branch of the tree of life as the other animals in this book. They look like waving streamers underwater and are easy to see in the Porcelain Basin.


More Pages

Select a set of letters to see photos of an animal whose name starts with that letter and to read a little bit about the animal:
  • ABCDE: Amphibian, Bison, Coyote, Deer, Eagle
  • FGHIJ: Fox, Grizzly Bear, Hare, Insect, Jackrabbit
  • KLMNO: Kestrel, Loon, Moose, Nutcracker, Otter
  • PQRST: Pronghorn, Thermus aQuaticus, Raven, Sheep, Trumpeter Swan
  • UVWXYZ: Uinta Ground Squirrel, Vole, Wolf, LynX, Yellowstone Cutthroat Trout, Zygogonium

More Information

Last updated: May 17, 2016

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Yellowstone National Park, WY 82190-0168



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