Equations from [25] used in our study to correct numbers of dead birds found at the power line, in order to account for removal by scavengers or missed observations during carcass searches.

<p>Different equations are given for the four size categories specified in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0032569#pone.0032569-Ponce1" target="_blank">[25]</a> (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0032569#pone-0032569-t003" target="_blank">Table 3</a> for their weights). We first corrected the number of carcasses found in the field by their size-dependent detectability (A). Second, we applied equation B for different carcass sizes where “days” is the number of days elapsed from the last visit. Third, we obtained a correction for every size category. Finally, we added C to A to obtain the mortality estimates for each category. The mortality estimate for a given power line was the sum of mortality estimates for the four carcass sizes.