Avifaunal inventory of a Southern Amazonian transitional forest site: the S o Luiz farm, Mato Grosso, Brazil

This paper describes the avifauna sampled at the S o Luiz farm, in Northern Mato Grosso State, a SouthernBrazilian Amazonian forest site. The avifauna was sampled at forested and open sites, between 29 June and 27July 2008, using point counts, mist-nets and general observations. We recorded 194 bird species within 18 ordersand 46 families. The records of this study expanded the known range limits of at least 16 bird species. Despitethe need for sampling in other seasons, the rarefaction curves indicate a representative sampling effort. Thebird community observed at this site contains most of the species typically associated with Amazonian forests,south of the Amazon, and suggests that ‘transitional forests’ found at this site should be qualified as ‘Amazonian’when considering their legal status. Our data highlights the importance of this anthropogenically-impacted andpoorly-known region of Amazonia.