Auryo remaining plays7/13/2023 ![]() The arroyo toad is a small (5 to 8 centimeters (cm) (2 to 3 inches)), light greenish gray or tan toad with warty skin and dark spots. Work is now in progress to determine if the arroyo toad is genetically distinct at the species level (S. microscaphus microscaphus) by the Mojave and Colorado Deserts. microscaphus californicus) is geographically isolated from the Arizona toad ( B. The currently accepted taxonomy of the arroyo toad as a subspecies of Bufo microscaphus, the southwestern toad, is based on morphological similarities (Stebbins 1951, Price and Sullivan 1988). In the following two decades, this toad was considered a subspecies of Bufo compactilis (Linsdale 1940) and of B. Camp's specimen was later shown to differ in several respects from Bufo cognatus and was afforded specific status as Bufo californicus (Myers 1930). This taxon was originally described as Bufo cognatus californicus from a specimen collected at Santa Paula, Ventura County (Camp 1915). The arroyo toad ( Bufo microscaphus californicus) is a small toad in the family Bufonidae. ![]() This rule implements the protection and recovery provisions provided by the Act for the arroyo southwestern toad. Only 6 of the 22 extant populations south of Ventura are known to contain more than a dozen adults. Threats to the survival of this species include: habitat degradation, predation, and small population sizes. ![]() The arroyo toad has been extirpated from an estimated 75 percent of its former range. The arroyo toad occurs exclusively in streams in southern California and northwestern Baja California, Mexico. SUMMARY: The Fish and Wildlife Service (Service) determines endangered status for the arroyo southwestern toad ( Bufo microscaphus californicus) pursuant to the provisions of the Endangered Species Act of 1973, as amended (Act). Fish & Wildlife ServiceĮndangered and Threatened Wildlife and Plants Determination of Endangered Status for the Arroyo Southwestern ToadĪGENCY: Fish and Wildlife Service, Interior. FINAL RULE: ARROYO SOUTHWESTERN TOAD, U.S.
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