Monday, January 23, 2017

Johnstone's Rain Frog, Eleutherodactylus johnstonei

Johnstone's Rain Frog, Eleutherodactylus johnstonei (Family Craugastoridae)

Males 17-25 mm, females, 17-35 mm. Dorsum brown or gray brown with one or two darker chevrons; a narrow middorsal stripe or a pair of broad dorsal stripes may be present;skin smooth to slightly tuberculate; distinct tympanum; small, rounded finger and toe disks; digits lack webbing. Native to Anguilla, Antigua and Barbuda, Barbados, Dominica, Grenada, Guadeloupe, Martinique, Montserrat, Netherlands Antilles, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines; introduced into Aruba, Bermuda, Colombia, Costa Rica, French Guiana, Guyana, Jamaica, Panama, Trinidad, Venezuela. Males usually call from low vegetation in disturbed habitat, it seems to avoid forests and undisturbed environments. Reproduces throughout the year with most activity during the wet season. Clutches 10-30 unpigmented eggs covered in a thin layer of viscous mucus which undergo direct development; froglets have body lengths of about 4 mm. It takes about a year for the frog to reach sexual maturity. In the 1980's this frog was restricted to Port of Spain, it has now spread east along the Eastern Main Road to St. Augustine, and can be heard at Piarco Airport. It has now reached Tobago.

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