Choice of Artificial Nest Structures by the Yellow-shouldered Blackbird, Agelaius Xanthomus
Yale School of Forestry and Environmental Studies, Tropical Resources Institute, 1990 - 34 pages
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1989 breeding season 20 meters activity surrounding artificial nest structures black mangrove trees Bonilla Boqueron Commonwealth Forest CAMA arrival CAMA nests w/in CAMA parasitism CAMA's Caribbean Martin CAMA Chi-square analyses Comparison Success Failure Comparison Used Unused Density of black density of red DF P Location distance to vegetation Effect Estimate Std Estimate Std Error function of location further than 40 greater probability height of black height of red logistic regression model mangrove trees 10m meters from vegetation meters of vegetation Mona Island nearest structure nearest YSBB nest Negative numbers indicate nest boxes nest building nest parasitism nest sites nest success Nesting Attempts nesting CAMA(s nesting within 20 nests w/in 40 Post and Wiley Post area Puerto Rico PVC-structures red & black red mangrove trees SCB parasitism Shiny Cowbird structures w/in 20 surrounding the structures type of nest U. S. Fish w/in 40 meters Yellow-shouldered Blackbird YSBB YSBB nests w/in YSBB's