Basin Spadefoot toads are the only amphibian found on the INL.
The spadefoot toad is gray or olive green
in color. The eyes are very large, golden yellow. They have a bump
between the eyes, giving the head a distinctive shape. Spadefoots
have a bumpy skin but are not quite as "warty" as Western
Toads. The bumps, or tubercles, are small and dark brown or reddish in
colour. There are light-coloured stripes down the sides of
the spadefoot's back, and the skin on the tummy is pale.
The most distinctive feature is the
source of their name: the small, black "spade" on the first
toe of each hind foot. This hardened tissue allows them to dig into
loose soil for shelter.