Mountain Birdwatch (MBW) 2.0 is a long-term citizen science monitoring program for 10 bird and 1 mammal species that breed in high-elevation spruce-fir forests of the northeastern United States and, formerly, southeastern Canada. Initiated in 2000 as Mountain Birdwatch 1.0, MBW provides the only region-wide source of population information on these high-elevation breeding birds. Each June, under the coordination of the Vermont Center for Ecostudies, volunteers perform repeated point counts at nearly 750 long-term fixed sampling sites along hiking routes in Vermont, New Hampshire, Maine, and eastern New York. Primary emphasis was placed on Bicknell’s Thrush, a montane-fir specialist that breeds only in the Northeastern U.S. and adjacent portions of Canada. In 2010, the program underwent many positive changes to reemerge as Mountain Birdwatch 2.0. All of the sampling locations prior to 2010 were permanently abandoned, and new sampling locations were chosen using a generalized random tessellation stratified (GRTS) procedure. For more information see: https://vtecostudies.org/projects/mountains/mountain-birdwatch/

Mountain Birdwatch (MBW) 2.0 is a long-term citizen science monitoring program for 10 bird and 1 mammal species that breed in high-elevation spruce-fir forests of the northeastern United States and, formerly, southeastern Canada. Initiated in 2000 as Mountain Birdwatch 1.0, MBW provides the only region-wide source of population information on these high-elevation breeding birds. Each June, under the coordination of the Vermont Center for Ecostudies, volunteers perform repeated point counts at nearly 750 long-term fixed sampling sites along hiking routes in Vermont, New Hampshire, Maine, and eastern New York. Primary emphasis was placed on Bicknell’s Thrush, a montane-fir specialist that breeds only in the Northeastern U.S. and adjacent portions of Canada. In 2010, the program underwent many positive changes to reemerge as Mountain Birdwatch 2.0. All of the sampling locations prior to 2010 were permanently abandoned, and new sampling locations were chosen using a generalized random tessellation stratified (GRTS) procedure. For more information see: https://vtecostudies.org/projects/mountains/mountain-birdwatch/

Mountain Birdwatch (MBW) 2.0 is a long-term monitoring program for songbirds that breed in highelevation forests of the northeastern United States and southeastern Canada. Initiated in 2000, as Mountain Birdwatch 1.0, MBW has prepared skilled volunteers to conduct annual surveys along 1-km point-count routes located in New York, Vermont, New Hampshire, and Maine. Primary emphasis was placed on Bicknell’s Thrush, a montane-fir specialist that breeds only in the Northeastern U.S. and adjacent portions of Canada. Ten focal species of birds and red squirrel are included in the bird surveys that happen annually in June. The Vermont Center for Ecostudies launched Mountain Birdwatch 2.0 in June of 2010.

Data were collected during 22 visits to two sites in Sierra de Bahoruco National Park, Dominican Republic, from 1995 - 2010. During each visit, we operated a standardized array of 30-35 mist nets (12-m x 2.6-m, 36-mm mesh) at each site. Detailed information on capture effort is included in this data set. We placed U.S. Fish and Wildlife Service aluminum leg bands on all North American migrant species and custom-made, uniquely numbered leg bands (Gey Band and Tag Company) on all Hispaniolan resident species. We did not have leg bands that fit Hispaniolan Emeralds (Chlorostilbon swainsonii), so we temporarily marked individuals of this species by clipping the distal 2-3 mm of up to three rectrices in a unique pattern; doing so allowed us to identify within-session recaptures. We aged and sexed all North American species using standard criteria according to Pyle (1997) and all resident species using criteria available in field guides (Latta et al., 2006) or based on our own accumulated field knowledge.

Mountain Birdwatch 1.0 is a long-term monitoring program for songbirds that breed in highelevation forests of the northeastern United States. Initiated in 2000, Mountain Birdwatch has prepared skilled volunteers to conduct annual surveys along 1-km point-count routes located in Massachusetts, New York, Vermont, New Hampshire, and Maine. Primary emphasis was placed on Bicknell’s Thrush, a montane-fir specialist that breeds only in the Northeastern U.S. and adjacent portions of Canada. Other focal species included Blackpoll Warbler, Swainson’s Thrush, White-throated Sparrow, and Winter Wren. The Vermont Center for Ecostudies launched a new, revised monitoring program- Mountain Birdwatch 2.0- in June of 2010.

Mountain Birdwatch 1.0 is a long-term monitoring program for songbirds that breed in highelevation forests of the northeastern United States. Initiated in 2000, Mountain Birdwatch has prepared skilled volunteers to conduct annual surveys along 1-km point-count routes located in Massachusetts, New York, Vermont, New Hampshire, and Maine. Primary emphasis was placed on Bicknell’s Thrush, a montane-fir specialist that breeds only in the Northeastern U.S. and adjacent portions of Canada. Other focal species included Blackpoll Warbler, Swainson’s Thrush, White-throated Sparrow, and Winter Wren. The Vermont Center for Ecostudies launched a new, revised monitoring program- Mountain Birdwatch 2.0- in June of 2010.

Mountain Birdwatch 1.0 is a long-term monitoring program for songbirds that breed in highelevation forests of the northeastern United States. Initiated in 2000, Mountain Birdwatch has prepared skilled volunteers to conduct annual surveys along 1-km point-count routes located in Massachusetts, New York, Vermont, New Hampshire, and Maine. Primary emphasis was placed on Bicknell’s Thrush, a montane-fir specialist that breeds only in the Northeastern U.S. and adjacent portions of Canada. Other focal species included Blackpoll Warbler, Swainson’s Thrush, White-throated Sparrow, and Winter Wren. The Vermont Center for Ecostudies launched a new, revised monitoring program- Mountain Birdwatch 2.0- in June of 2010.