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There is no formal population survey specifically designed to index population abundance of band-tailed pigeons throughout their range. Data from the Breeding Bird Survey (BBS), Washington and Oregon Mineral-Site (WAORMS) surveys, and Washington Call Count (WACC) survey offer evidence of long-term population decline. We investigated the potential to augment BBS, WACC, and WAORMS surveys to provide more precise population indices for the Pacific Coast band-tailed pigeon (P. f. monilis) and augment the BBS to index the Interior or “Four Corners” population (P. f. fasciata). We calculated statistical power, the probability of detecting population change given that a change exists, and analyzed survey data to investigate the effect of route length, survey repetition, and sample size...Mineral-site surveys provide the greatest potential to monitor breeding populations and detect short-term trends in the Pacific Coast population. New survey techniques are needed for the Interior band-tailed pigeon.
Evaluation of current population indices for band‐tailed pigeons | Request PDF. Available from: https://www.researchgate.net/publication/230512884_Evaluation_of_current_population_indices_for_band-tailed_pigeons