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Couch's spadefoot toad
Couch's spadefoot toad (''Scaphiopus couchii'') is a species of North American spadefoot toad. 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 Smithsonian Institution.
==Description==
Unlike other toads which have horizontal pupils, spadefoot toads have vertical pupils. On the underside of the hind foot is a hard, dark "spade" that gives spadefoot toads their name. These creatures can grow to be 3.5" in length. These "spades" are used by the toads to burrow into the ground to prevent water loss and hide from predators. There are two spadefoot species in the Sonoran Desert of Arizona and California. Couch's spadefoot toad (''Scaphiopus couchi'') has a sickle-shaped "spade", whereas the western spadefoot toad (''Spea hammondii'') has a rounded "spade". Spadefoots are not true toads and should therefore simply be called spadefoots.〔Arizona-Sonora Desert Museum: Couch’s spadefoot (''Scaphiopus couchi''), http://www.desertmuseum.org/books/nhsd_spadefoot.php, 2006-2010.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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