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Gregarious Nesting Behavior of Thick-Billed Parrots (Rhynchopsitta pachyrhyncha) in Aspen Stands

Tiberio C. Monterrubio-Rico, Javier Cruz-Nieto, Ernesto Enkerlin-Hoeflich, Diana Venegas-Holguin, Lorena Tellez-Garcia and Consuelo Marin-Togo
The Wilson Journal of Ornithology
Vol. 118, No. 2 (Jun., 2006), pp. 237-243
Stable URL: http://www.jstor.org/stable/20455863
Page Count: 7
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Gregarious Nesting Behavior of Thick-Billed Parrots (Rhynchopsitta pachyrhyncha) in Aspen Stands
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Abstract

We studied Thick-billed Parrot (Rhynchopsitta pachyrhyncha) nest-site density and social nesting behavior from 1998 to 2001 in Madera, Chihuahua, Mexico. The species formed high-density nesting clusters; 45 nesting attempts (30%) involved nesting pairs sharing nest trees, with a maximum of three nesting pairs per tree. The majority of nest trees were live or dead quaking aspens (Populus tremuloides). Clusters contained a mean of 11.5 breeding pairs (5 nests/ha). The highly social nesting behavior of Thick-billed Parrots may have important implications for management and conservation of their breeding habitat.

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