Bufo (western toad) - Deep croaks and gihting assessment in toads Bufo bufo (Abstract only)
Optimal mate selection in the toad Bufo bufo (Abstract only)
Pseudacris (tree frog) - Wikipedia
Spea (Western Spadefoot) - Spea hammondii
Caudata (salamander & newts) - The Newt and Salamander Portal
