Rocky Mountain Amphibian Project

A WYOMING BIODIVERSITY CITIZEN SCIENCE INITIATIVE PROJECT


Boreal Chorus Frog (Pseudacrais maculata)

The Boreal Chorus Frog

IDENTIFICATIONcac516bf681f205f715a0eeef65bd23f_f216.jpg

  • Smallest frog in Wyoming
  • Size:  3/4 inch (metamorph) to ~1.5
  • Dorsal color: tan, green, or rust red
  • Dorsal pattern highly variable, typically 3 sets of stripes down back, but stripes often broken into spots
  • Dark mask typically extends from nose to groin as a stripe
  • No dorsolateral folds!
  • Often heard rather than seen.  Call sounds like running a thumb nail along a comb (criiiiiiiiiiiik)
  • Mp3 of call (courtesy of NatureNorth.com)

 

Photo above: Wendy Estes-Zumpf

EGGS & TADPOLES

  • Small egg clusters (≤ 1 inch) of up to 200 eggs wrapped around vegetation
  • Tadpoles dark but belly may develop a lighter metallic sheen
  • Only tadpole in WY with lateral eyes (eyes stick out to sides and form part of the body’s profile)
  • Anal vent is on the side

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Egg mass photo: Charlotte Snoberger                  Tadpole photo: Wendy Estes-Zumpf                 Metamorph photo: Ochsenfeld

 

BREEDING HABITAT

Shallow water with emergent vegetation (ranging from wet meadows to reservoirs).

AmphibianHabitat_WYNDD9.jpg

Photo by Wyoming Natural Diversity Database

 

NATIVE RANGE

BorealChorusFrog.jpgMap by Wyoming Natural Diversity Databse