Meta-data and mortality rates for studies meeting inclusion criteria for estimation of bird mortality at power lines in the United States and/or summary of mortality by species.

aType of power line studied, including low-voltage (2.4–60 kV) distribution lines (dist), high voltage (>60 kV) transmission lines (trans), both line types (both), or no information provided about line type (?).bDoes study survey for and present data for all bird species, not just particular species groups?cWas study used in estimate of annual bird mortality at power lines?dWas study used for species counts (Table S2)? Excluded U.S. studies focused on particular bird group(s) without including all species; all international studies were excluded because of different species assemblages in other countries).estudy meets inclusion criteria but was not included in the estimate of annual bird mortality because mortality rate is a statistical outlier among studies meeting inclusion criteria.fstudy meets inclusion criteria for species summary but excluded from mortality estimate because no information provided about length of wire sampled.gstudy meets inclusion criteria but was not included in the estimate of annual bird mortality because mortality rate is adjusted for biases associated with carcass surveys; these biases were later accounted for in our analyses (see main text).