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Arizona toad
The Arizona toad (''Anaxyrus microscaphus'') is a species of toad in the family Bufonidae. It is endemic to the southwestern United States, where its natural habitats are temperate lowland forests, rivers and streams, swamps, freshwater marshes, freshwater springs, ponds, open excavations, irrigated land, and seasonally flooded agricultural land.
==Taxonomy==
The Arizona toad was first described by the American herpetologist Edward Drinker Cope in 1867. He named it ''Bufo microscaphus'' and the type locality was Fort Mohave, Arizona. It was commonly known as the southwestern toad and for many years, three subspecies were recognized, ''B. m. microscaphus'', ''B. m. californicus'' and ''B. m. mexicanus''. In 1998, the American herpetologist A. W. E. Gergus raised all three to full species status on the basis of allozyme evidence, allopatry and morphology.〔 The large genus ''Bufo'' was split by Frost et al. in 2006, with the North American species being included in the genus ''Anaxyrus''.〔
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