Non-breeding Ecology of Loggerhead Shrikes in Kentucky (original) (raw)
2011, The Wilson Journal of Ornithology
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2016
We monitored a breeding population of loggerhead shrikes (Lanius ludovicianus) in the Midewin National Tallgrass Prairie from 2005 to 2016. Demographic data were compiled annually, including information on population size, age structure, and reproductive success. We banded adult shrikes, with some additional effort focused on nestlings (2005–2007) and independent hatch-year birds (2014–2016). We measured return rate as the number of birds that were previously banded. Site reuse rates were quantified as the use of a breeding territory in multiple years. Site fidelity, the use of a site by the same male or female in consecutive years, and dispersal distance of banded birds from their natal or previous breeding territory were assessed in 2015 and 2016, after inception of a color-banding program in 2014. Population size ranged from 4 to 14 breeding pairs, with additional single nonbreeding birds noted in most years. The percentage of the population that successfully fledged at least one...
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