As regular CFZ-watchers will know, for some time Corinna has been doing a column for Animals & Men and a regular segment on On The Track... particularly about out-of-place birds and rare vagrants. There seem to be more and more bird stories from all over the world hitting the news these days so, to make room for them all - and to give them all equal and worthy coverage - she has set up this new blog to cover all things feathery and Fortean.

Monday, 1 January 2018

Urban Cooper's hawks outcompete their rural neighbors

Date:December 13, 2017
Source:American Ornithological Society Publications Office

Summary:Depending on whether a species flourishes in a city environment, urban wildlife populations can be 'sources' or 'sinks,' either reproducing so quickly that individuals leave to colonize the surrounding area or needing constant immigration from outside to stay viable. A new study examines the population dynamics of Cooper's hawks in urban Albuquerque, N.M., and finds that city-born birds aren't just thriving -- they're actually forcing their rural neighbors out of their nest sites.

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