Median population estimates (SD) for the double observer method.

ap1 and p2 are the detection probabilities for observers 1 and 2, respectively.
The overall detection probability was near 64 or 84% with equal and or unequal detection probabilities for the two observers. Results are provided for the low (LC) and high (HC) clustered populations. Proportion surveyed was 50%. Values are based on 1,000 simulated surveys.