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Trends in numbers of american kestrels falco sparverius on roadside counts in south central florida usa from 1968 1976


, : Trends in numbers of american kestrels falco sparverius on roadside counts in south central florida usa from 1968 1976. Florida Field Naturalist 8(1): 1-10

Census data on the seasonal, yearly variation in population levels of migrant, winter resident, F. s. sparverius, and the resident race, F. s. paulus, were compiled from the Lake Wales Ridge region, Highland County. Large population differences of wintering kestrels in different areas in the state suggest that an actual reduction in the population of F. s. sparverius, a change in migratory patterns or the prevailing winter weather conditions farther north are responsible. A seasonal difference in sex ratio suggests that males may be more prevalent in spring than during fall and winter. Tables including data from various Florida localities are presented.

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