Statistical analysis for 2021 survey of wild burro abundance in the Black Mountain Herd Management Area

In November 2021, Bureau of Land Management (BLM) personnel conducted simultaneous double-observer aerial surveys of the wild burro populations in the Black Mountain Herd Management Area. Surveys were conducted using methods recommended by BLM policy and a recent National Academy of Sciences review with detailed field methods. These data were analyzed using methods to estimate sighting probabilities for wild burros, with sighting probabilities then used to correct the raw counts for systematic biases (undercounts) that are known to occur in aerial surveys, and to provide confidence intervals (which are measures of uncertainty) associated with the abundance estimates.