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Aspectos da ecologia de Tropidurus torquatus foram estudados mensalmente na restinga de Guriri, São Mateus, Norte do Espírito Santo, de fevereiro de 1996 a março de 1997. Foram coletados 108 exemplares com arma de pressão, sendo 45 machos, 56 fêmeas e 7 exemplares cujo sexo não foi identificado. O comprimento rostro-anal no total dos exemplares variou de 26,0 a 101,8 mm (média = 61,7 mm; DP = 15,1). O peso no total dos exemplares variou de 0,8 a 39,6 g (média = 14,6 g; DP = 10,4). Em freqüência de ocorrência, os itens alimentares que predominaram na dieta de T. torquatus foram as formigas (85,7%), coleópteros (32,4%), abelhas (31,4%), cupins (22,8%), aranhas (20,9) e flores (20,0%). Em relação à freqüência numérica, os itens alimentares que predominaram foram as formigas (41,2%) e cupins (40,8%). O número total de presas encontrado nos conteúdos estomacais de T. torquatus foi de 2.903. Este número no total dos exemplares variou de 1 a 268 (média = 27,6; DP = 36,2). Tropidurus torquatus é um predator do tipo senta-e-espera. O comportamento oportunístico desta espécie, cuja dieta inclui invertebrados, pequenos vertebrados (outros lagartos) e vegetais (flores e sementes), pode ser a explicação do sucesso deste lagarto em uma diversidade de hábitats. Ecological aspects of the collared lizard, Tropidurus torquatus, were studied monthly in a sandy coastal plain of southeastern Brazil, from February 1996 to March 1997. We collected 108 specimens using a pressure gun, of which 45 were males, 56 females, and 7 specimens which sex was not possible to identify. The snout vent length (SVL) ranged from 26.0 to 101.8 mm (mean = 61.7 mm; SD = 15.1). Total weight varied from 0.8 to 39.6 g (mean = 14.6 g; SD = 10.42). Based on the frequency of occurrence, major food items found in the stomach contents of T. torquatus were: ants (85.7%), beetles (32.4%), bees (31.4%), termites (22.8%), spiders (20.9) and flowers (20.0%). Based on the relative number of prey ingested, main food items were: ants (41.2%), and termites (40.8%). Total number of prey found in the stomachs of the collared lizard was 2,903, which varied in individual stomachs from 1 to 268 (mean = 27.6; SD = 36.2). Most of the time T. torquatus is a sit-and-wait predator. Its opportunistic feeding behavior, including invertebrates, small vertebrates (other lizard species), and vegetables (flowers and seeds), may contribute to the success of this lizard in colonizing a diversity of habitats

Ecologia de Tropidurus torquatus (Sauria: Tropiduridae) da Restinga de Guriri, São Mateus, ES