Revista Brasileira de Ornitologia 25(4): 277–296. ARTICLE December 2017 Twenty years later: an update to the birds of the Biological Dynamics of Forest Fragments Project, Amazonas, Brazil Cameron L. Rutt1,2,5, Vitek Jirinec1,2, Erik I. Johnson2,3, Mario Cohn-Haft1,4, Claudeir F. Vargas1 & Philip C Stouffer1,2 1 Biological Dynamics of Forest Fragments Project, Instituto Nacional de Pesquisas da Amazônia, Manaus, AM, Brazil. 2 School of Renewable Natural Resources, Louisiana State University and Louisiana State University AgCenter, Baton Rouge, LA, USA. 3 National Audubon Society, Baton Rouge, LA, USA. 4 Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, AM, Brazil. 5 Corresponding author:
[email protected] Received on 04 July 2017. Accepted on 14 December 2017. ABSTRACT: Although species lists from throughout Amazonia have become available, relatively complete inventories based on long- term work remain rare. Longitudinal comparisons at well-studied sites provide the best opportunities for describing communities and identifying changes in regional avifaunas. Within central Amazonia, no region has received as much consistent ornithological coverage as the terra firme forests north of Manaus, Brazil, at the Biological Dynamics of Forest Fragments Project (BDFFP). Here we provide an updated list of the area, including notes on all species added between 1997 and 2017. We recorded 21 species new for the site, most of which (>75%) are birds that prefer várzea or second-growth forest. This brings the cumulative BDFFP list up to 409 species, the majority (66%) of which inhabit primary terra firme forest. Together, this confirms that the regional terra firme community had been well-characterized by the 1990s, and that species additions to the list over the last 20 years are consistent with a changing landscape as urbanization, agriculture, and second-growth spread from Manaus.