WebJun 22, 2024 · The North American Breeding Bird Survey provides scientifically credible measures of the status and trends of North American bird populations, at continental and regional scales, to inform biologically sound conservation and management actions. Key features of the BBS that distinguish it from most other avian monitoring programs are its ... WebOct 1, 2005 · Bart et al. (2004) develop methods for predicting needed samples for estimation of long-term trends from count survey data, and they apply these methods to the North American Breeding Bird Survey (BBS). They recommend adding approximately 40% more survey routes in the BBS to allow for estimation of long-term (i.e., 20 year) trends …
BBS bird population trends BTO - British Trust for
WebAbout BBS population trends. The BBS is a line-transect survey based on randomly-located 1-km squares. Squares are chosen through stratified random sampling, with more squares in areas with more potential … WebDec 13, 2013 · The North American Breeding Bird Survey The BBS provides the most extensive historical database for monitoring avian populations in North America. It was initiated in the eastern United States and Canada in 1966, and expanded to provide coverage of the continental United States and southwestern Canada by 1968. pbs migrants
ANALYSIS OF THE NORTH AMERICAN BREEDING BIRD …
WebThis page provides a summary of population trends and breeding distributions of grassland birds in North America, as documented by the North American Breeding Bird … WebThe North American Breeding Bird Survey (BBS) provides information regarding population change for >420 bird species in the United States and Canada (Sauer et al. 2008). The BBS is the primary data source for modeling consequences of changes in land uses, climate, or other possible stressors on most North American bird populations … WebFeb 21, 2024 · Only four species show a positive trend, including Warbling Vireo, Cassin’s Vireo, House Wren, and Ash-throated Flycatcher. Fifty percent of included species show a statistically significant negative long-term trend, with the average decline being around 48 percent (ouch!). pbs pov not going quietly