Comparison of grassland bird focal species richness estimated by acoustic recording units (ARUs) and point count surveys.

Species richness was calculated across three time periods with ARUs using six different BirdNET confidence threshold settings. These ARU-based measures of species richness were compared to species richness calculated from point count surveys for the same time period. Positive average Δ species richness values indicate greater species richness calculated from the ARUs with BirdNET compared to the point count surveys. A * denotes statistical significance (α = 0.05) using paired t-tests. See Methods for description.