Rocky Mountain Amphibian Project

A WYOMING BIODIVERSITY CITIZEN SCIENCE INITIATIVE PROJECT


Columbia Spotted Frog (Rana luteiventris)

The Columbia Spotted Frog

IDENTIFICATION41e032c9f633a6c4f186b91fc595cf2e_f223.jpg

  • Size: 3/4 inch (metamorph) to ~3.9 inches
  • Dorsal color: tan to dark olive
  • Irregular dark spots, often with light centers
  • Dorsal skin has warty texture
  • Dorsolateral folds present
  • Red to orange lower abdomen and legs (see photo right)
  • Breeding males have swollen thumbs
  • Mp3 of call (courtesy of Gary Nafis, californiaherps.com; contact Gary for permission to post on other websites)

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Adult in water photo: Wyoming Game and Fish Deparment     Photos above: Leuenberger

EGGS & TADPOLES

  • Eggs in round cluster (~3 to 8 inches) with up to 2,500 eggs that are dark on top, light below
  • Egg masses are free floating and often in large communal clusters
  • Tadpoles dark above with gold or brassy flecks and lighter bellies, often with a metallic sheen
  • Tadpoles eyes are medial, anal vent is on the side

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Egg mass and metamorph photos: Patla

BREEDING HABITAT

Shallow stagnant or slow-moving water ranging from temporary ponds and marshes to lakes and backwater areas of streams.

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Photo by Zars

NATIVE RANGE

ColumbiaSpottedFrog.jpgMap by Wyoming Natural Diversity Database