• A bull elk bugles in Yellowstone National Park


    National Park ID,MT,WY

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Columbia spotted frog

Colombia Spotted Frog
Columbia spotted frog
Courtesy J. Fleming
Scientific name: Rana luteiventris


  • Abundant and best known amphibian in Yellowstone.
  • Maximum length is 3.2 inches; newly metamorphosed juveniles are less than one inch long.
  • Upper surface of the adult is gray-brown to dark olive or even green, with irregular black spots; skin is bumpy; underside is white splashed with brilliant orange on the thighs and arms on many, but not all, individuals.
  • Tadpoles have long tales and may grow to 3 inches long.

  • Found all summer along or in rivers, streams, smaller lakes, marshes, ponds, and rain pools.
  • Lays eggs in stagnant or quiet water, in globular masses surrounded by jelly.

  • Breeds in May or early June, depending on temperatures.
  • Tadpoles mature and change into adults between July and September.
  • Tadpoles eat aquatic plants; adults mostly eat insects, but are highly opportunistic in their food habits (like many other adult amphibians).

Did You Know?

Bison in Yellowstone.

There are more people hurt by bison than by bears each year in Yellowstone. Park regulations state that visitors must stay at least 25 yards away from bison or elk and 100 yards away from bears.