Rimmer, C. C., Vermont Center for Ecostudies, Norwich, Vermont, USA, firstname.lastname@example.org;
Hart, J. A., Vermont Center for Ecostudies, Norwich, Vermont, USA, email@example.com;
Dettmers, R. P., U.S. Fish and Wildlife Service, Hadley, Maasachusetts, USA, Randy_Dettmers@fws.gov;
Whittam, B., Bird Studies Canada, Sackville, New Brunswick, Canada, firstname.lastname@example.org;
McFarland, K. P., Vermont Center for Ecostudies, Norwich, Vermont, USA, email@example.com;
Aubry, Y., Canadian Wildlife Service, Ste. Foy, Québec, Canada, Yves.Aubry@ec.gc.ca
Abstract: Bicknell’s Thrush is among the Nearctic-Neotropical migrants of highest conservation priority in North America. Its rarity (estimated global population of < 50,000 individuals), restricted breeding and winter distributions, habitat specialization, and vulnerability to multiple rangewide threats are compounded by incomplete knowledge about its overall status. The species exhibits a complex mating system and a highly skewed breeding adult sex ratio. Sexual habitat segregation may occur in winter, and females appear to be limited at some point in the annual cycle. Recent population trend data show conflicting results, with sharply declining populations in Maritime Canada and stable or slightly increasing trends in the U.S. On the species’ Greater Antillean wintering grounds, where an estimated 90% of the global population occurs on Hispaniola, loss of forested habitats has been severe and is ongoing. The International Bicknell’s Thrush Conservation Group (IBTCG) formed in 2007 to develop and implement a scientifically-based conservation action plan for the species. We will present an overview of the conservation challenges facing Bicknell’s Thrush, highlight the IBTCG’s primary goals and recommendations, and assess the prospects for this at-risk species.