Fig. 1
. Tanguro farm, Mato Grosso, Brazil (triangles, Preserved gallery forest (PGF); Stars, Highly anthropogenic gallery forest (HAG), adjacent to soybean plantations; Squares, Soybean plantation (SP), areas with no permanent vegetation; diamond, Hevea brasiliensis plantation (RP); circles, margin of the Tanguro River (MTR) (image modified from IPAM, 2007).
Fig. 2
. Diagram derived from the Principle Coordinates Analysis (PCO) of the species composition of the snake communities (presence/absence of 171 species) of ten localities representing the Amazonia (closed circles), Cerrado (open squares), and Atlantic Forest (open circles) biomes. Amazonia: Manaus (Martins & Oliveira, 1998Martins, M. & Oliveira, M.E. 1998. Natural history of snakes in forests of the Manaus Region, Central Amazonia, Brazil. Herpetological Natural History 6:78-150.); Caxiuanã (Maschio et al., 2009Maschio, G. F.; Santos-Costa, M. C. & Prudente, A. L. C. 2009. Comunidades de Serpentes da região de Caxiuanã com avaliação da eficiência dos métodos de captura. In: Lisboa, P. ed. Caxiuanã: Desafios para a conservação de uma Floresta Nacional na Amazônia. Belém, Museu Paraense Emílio Goeldi, p. 589-603.); Espigão do Oeste (Bernarde & Abe, 2006Bernarde, P. S. & Abe, A. S. 2006. Snake communities at Espigão do Oeste, Rondônia, Southwestern Amazon, Brazil. South American Journal of Herpetology 1:102-113.); Claudia, MT (M. A. Carvalho, unpublished data). Cerrado: região do Manso (Strüssmann, 2000Strüssmann, C. 2000. Herpetofauna. In: Ministério do Meio Ambiente ed. Fauna silvestre na região do Rio Manso - MT. Brasília, Editora IBAMA, Centrais Elétricas do Norte do Brasil, p. 153-189.); Cuiabá (Carvalho & Nogueira, 1998Carvalho, M. A. & Nogueira, F. 1998. Serpentes da área urbana de Cuiabá Mato Grosso: aspectos ecológicos e acidentes ofídicos associados. Cadernos de Saúde Pública Rio de Janeiro 14:753-763.); Itirapina (Sawaya et al, 2008Sawaya, R. J.; Marques, O. A. V.& Martins, M.2008. Composition and natural history of a Cerrado snake assemblage at Itirapina, São Paulo State, Southeastern Brazil. Biota Neotropica 8: 129-151.). Atlantic Forest: Juréia (Marques, 1998Marques, O. A. V. & Puorto, G. 1998. Feeding, reproduction and growth in the crowned snake Tantilla melanocephala (Colubridae), from southeastern Brazil. Amphibia-Reptilia 19:311-318.); Paraná (S. A. A. Morato, unpublished data).
Fig. 3
. Dendrogram generated by the WPGMA cluster analysis of the snake species collected at Tanguro, Mato Grosso, Brazil. Different colors represent the ecological guilds, based on diet, substrate use, and activity cycle: black (nocturnal, semi-aquatic species that feed primarily on fish and amphibians); dark gray (terrestrial and/or semi-arboreal species, feed primarily on anurans); light gray (terrestrial and/or semi-arboreal species, generalist diet); white (nocturnal, fossorial and/or cryptozoic).
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