Rocky Mountain Amphibian Project

A WYOMING BIODIVERSITY CITIZEN SCIENCE INITIATIVE PROJECT


Western (Boreal) Toad (Anaxyrus boreas)

The Western (Boreal) Toad
Other names: Western Toad, Boreal Toad, Anaxyrus boreas boreas, Bufo boreas boreas

IDENTIFICATIONBorealToad_Weinmann-400pxt.jpg

  • Size: ~3/4 inch (metamorph) to ~4.5 inches (adult)
  • Dorsal color: light olive to dark brown
  • Dark raised warts
  • White dorsal stripe
  • Ventral color: white with black spots
  • No cranial crest
  • Mp3 of call (courtesy of Gary Nafis, californiaherps.com; contact Gary for permission to post on other websites)

Photo by Weinmann

 

EGGS & TADPOLES

  • Egg strings with lots of jelly, usually wrapped around vegetation
  • Tadpole eyes are medial
  • Uniformly dark black tadpoles with anal vent on midline

BorealToad_tadpoles2_Ochsenfeld-400px.jpg      

Photo by Ochsenfeld

 

BREEDING HABITAT

Shallow water in ponds, flooded meadows, and slow or moving pooled water on the edge of streams.

AmphibianHabitat_Estes-700px.jpg

Photo by Wendy Estes-Zumpf

 

NATIVE RANGE

BorealToad.jpg

Map by Wyoming Natural Diversity Database