Hemidactylus palaichthus, a gecko with an unusual satellite
island distribution . JCM
They found four species on Goat Island (Thecadactylus rapicauda, Iguana iguana, Anolis richardii, and Cnemidophorous lemniscatus) all species that are exceptionally good at dispersal and colonization.St. Giles Island produced five speices (Thecadactylus rapicauda, Iguana iguana, Gonatodes ocellatus, Mastigodryas dunni, and an unidentified skink in the genus Mabuya), again species that excell at disperal and colonization.
Little Tobago has a more specious herpetofauna, undoudtedly due to its greater size. The authors report includes: Rhinella marina, Leptodactylus fuscus, Gonatodes ocellatus, Hemidactylus palaichthus, Sphaerodactylus molei, Thecadactylus rapicauda, Bachia heteropa alleni, Ameiva ameiva (now A. atrigularis), Cnemidophorus lemniscatus, Iguana iguana, Leptophis ahaetulla coeruleodorsus, and Mastigodryas boddaertri dunni (now M. dunni).
Given the proximity of these island to Tobago (Goat Island is about 0.95 km, St. Giles Island is about 0.74km, and Little Tobago is about 1.77 km from Tobago) the presence of these species is not too unexpected. However, it very useful to have these distributions documented for biogeography studies.
Charles, SP, Stephen Smith, S, & de Jonge J. M. A.. 2011. Terrestrial Herpetofauna of Some Satellite Islands North-east of Tobago with Preliminary Biogeographical Comparisons with Some Satellite Islands North-west of Trinidad. The Living World Journal of the Trinidad and Tobago Field Naturalist's Club, 2011, 54-59.