Abstract
We compared pronghorn (Antilocapra americana) composition survey estimates among observers and examined factors that may influence classifications at 4 sites in Wyoming. We also compared fixed-wing aerial to ground survey estimates. Observer disagreement was related to size of pronghorn group (P < 0.01) during ground surveys. Fixed-wing aerial surveys yielded significantly lower adult buck ratios than ground surveys in 3 of 6 (P < 0.05) comparisons. Observers' classifications differed in 3 of 12 ground, and 5 of 12 aerial comparisons (P < 0.05) with half the disagreements being fawn ratios. Neither aerial nor ground surveys was consistently more precise. Precision of individual observers was similar at most sites within methods.
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