Kelly J. Irwin 2 1. Historical versus Current Distribution. Sheep frogs Hypopachus variolosus range from Costa Rica northward through Mexico and reach the northern limit of their distribution in southern Texas Smith and Barlowe, ; Conant and Collins, In Texas, B. Brown gave the range as extending from Cameron and Hidalgo counties along the Rio Grande, and north to Duval County; subsequent maps have extended the range farther north.
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Small, oval body with smooth skin. Small head with pointed snout and fold of skin immediately behind eyes. Hind feet are slightly webbed and each with two tubercles Gastrophryne with one. Coloration: Dorsal color brown or olive green with a thin yellow middorsal stripe. Dark spots in mottled pattern may appear on dorsum. Ventral surface is gray with possible mottling. Thin white line down length of ventral surface that branches at the forelimbs. Adult males with dark throat.
Size: Hypopachus variolosus reaches an adult size between 2. Behavior: Hypopachus variolosus feeds mainly on ants and termites. The sheep frog hides most of the year, but may emerge at night or with heavy rains in late summer.
Reproduction: Breeding in Hypopachus variolosus takes place from March to September with rain, in Texas typically August and September. Males call while floating in water with their forelimbs resting on a stem or twig. Habitat: Hypopachus variolosus frog prefers subterranean burrows, such as those of pack rats. This species also burrows under fallen tree limbs and remains in these burrows for most of the year.
Conservation Status: The sheep frog is considered a threatened species by the Texas Parks and Wildlife Department and is fully protected by the state. Map is based on museum voucher specimens.
Biodiversity of Costa Rica