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BIRD POPULATIONS - Birdpop.org

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DISTRIBUTION AND ABUNDANCE OF BURROWING OWLS IN CALIFORNIAFIGURE 7. The number of Burrowing Owl pairs detected on survey blocks in the southern and eastern SanFrancisco Bay Area during IBP’s 1991-1993 survey (indicated in lower right corner of each block) and 2006-2007survey (indicated in upper right corner of survey block). Light gray shading indicates urban land cover as of1992; dark gray shading indicates areas that were not mapped as urban in 1992, but were converted to urbanuse between 1992 and 2001 (Multi-resolution Land Characteristics Consortium 2001).[19]

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