• Steam rises off of the colorful Mammoth Hot Springs Terraces


    National Park ID,MT,WY

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).

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