Rediscovery, distribution extension and defensive behaviour of Xenodon histricus (Squamata: Serpentes) in the state of Rio Grande do Sul, Brazil.

The article discusses a study conducted on the behavior, rediscoveries and extensions in the geographic distribution of the snake species Xenodon histricus. Topics discussed include the expressions of defensive behavior shown by a specimen of the species during the study, rediscovery of the species in the state of Rio Grande do Sul, Brazil and a map showing the geographic distribution of the species.