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Estimation of molt phenology under molt- and date-dependent sampling bias: a comparison of conventional and recapture-based methods

Ronald L. Mumme, Auteur ; Robert S. Mulvihill, Auteur ; David Norman, Auteur

Dans Wilson Journal of Ornithology (The) (137(4) December, 2025)

Recent evidence indicates that molt-dependent sampling bias may distort estimates of population-level molt phenology, but these distortions can be minimized by making explicit use of data derived from individuals recaptured at different points o[...]

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Producing regional estimates of population size for common and widespread breeding birds from national monitoring data

David Norman, Auteur ; Robert J. Harris, Auteur ; Stuart E. Newson, Auteur

Dans Bird Study (59(1) FEB 2012)

Capsule Line transect data from large-scale common bird monitoring schemes can be used to provide population estimates for many common and widespread species at a regional level. Aims To test the sample sizes necessary to derive regional populat[...]

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Density-dependent survival and recruitment in a long-distance Palaearctic migrant, the Sand Martin Riparia riparia

David Norman, Auteur ; Will J. Peach, Auteur

Dans Ibis (155(2) APR 2013)

Long-term studies can provide powerful insights into the relative importance of different demographic and environmental factors determining avian population dynamics. Here we use 23years of capturemarkrecapture data (19812003) to estimate recrui[...]

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