As might be expected, amphibians are scarce in the monument because of
lack of permanent water. The few springs and seeps, however, furnish
excellent breeding places for several species of amphibians. Best known
among these are the RED-SPOTTED TOAD, LEOPARD FROG, and CANYON TREEFROG,
the latter common near Manning Camp. A spectacular desert amphibian and
the second largest toad in the United States, is the huge COLORADO RIVER
TOAD, sometimes found near residences in the evening when outdoor lights
attract swarms of insects.