A Preliminary Comparison of Texas and Arizona Harris' Hawk (Parabuteo Unicinctus) Populations
Journal
Raptor Research
Volume
10
Issue
2 (Summer)
Year
1976
Pages
50-54
Section
Scientific Papers
Online Text
ABSTRACT
Nineteen Harris' Hawk nests found in west Texas were associated closely with Mesquite. Nest site characteristics were measured. Eight successful nests fledged 15 young, averaging 1.87 per nest. Only one nesting threesome was found. In a similar Harris' Hawk population in southern Arizona, approximately half the nests were attended by threesomes. The difference in the numbers of threesomes in the two populations may be a result of differential nest success and/or the effects of population shifts associated with an arid environment.
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