Boreal Chorus Frog (Pseudacris maculata)


  • 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

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

borealchorusfrog_eggs_Snoberger.jpg    BorealChorusFrog_tadpole_Estes-Zumpf.jpg     BorealChorusFrog_metamorph_Ochsenfeld.jpg

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).


Photo by Wyoming Natural Diversity Database


Native Range

BorealChorusFrog.jpgMap by Wyoming Natural Diversity Databse