Syntopy in California red-legged and foothill yellow-legged frogs in their aquatic habitat

Abstract

Co-occurrence of two or more species of amphibians with biphasic life cycles is extremely common in North America, particularly around the east coast of the United States (Petranka 1998;Lannoo 2005;McGinnis and Stebbins 2018). On the west coast, different amphibians are often sympatric (share the same distribution) and/or syntopic (share the same habitat at the same time) over a wide range of genera and species, including various assemblages of