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The American toad (Anaxyrus americanus) [3] is a common species of toad found throughout Canada and the eastern United States.It is divided into three subspecies: the eastern American toad (A. a. americanus), the dwarf American toad (A. a. charlesmithi) and the rare Hudson Bay toad (A. a. copei).
[citation needed] Since American spadefoot toads breed in shallow waters, they are under "constant stress from drying waters, increasing temperatures, reduced food densities, and crowding". [9] This stress, or simply a lack of adequate food, can increase the likelihood of cannibalism. [9] If they do resort to cannibalism, their bodies can ...
A Californian toad doing an aggressive call. The California toad is less blotched (reduced dorsal melanin) than the boreal toad. It has a wider head, larger eyes, smaller feet, and a weaker development of the margins along the dorsal stripe. The largest western toad larvae at 56 mm is also of the California toad. The toad has a wide range of ...
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The toad is able to absorb water from the surrounding soil; even as the soil becomes increasingly dry in spring and early summer months, increased concentrations of urea in the toad's body allow it to continue to suck water out of the soil through osmosis. When the summer rains arrive the Great Basin spadefoot emerges from its burrow. [4]
The call of Couch's spadefoot toad. Couch's spadefoot toad or Couch's spadefoot (Scaphiopus couchii) is a species of North American spadefoot toad (family Scaphiopodidae). [2] The specific epithet couchii is in honor of American naturalist Darius Nash Couch, who collected the first specimen while on a personal expedition to northern Mexico to collect plant, mineral, and animal specimens for ...
The western toad (Anaxyrus boreas) is a large toad species, between 5.6 and 13 cm (2.2 and 5.1 in) long, native to western North America. [ 1 ] [ 3 ] [ 4 ] A. boreas is frequently encountered during the wet season on roads, or near water at other times.