Article Abstract:
A study was performed to determine the effects of forest strata, time of season and habitat differences in nest predation of birds within the Hubbard Brook Experimental Forest in New Hampshire from 1990 to 1991. Nest predation was believed to be the main reason of nest failures for many bird species. Results revealed that depredation rates at artificial nests were estimated between 58% to 63% and varied with time of season. The greatest differences in depredation rates were manifested by forest strata while there was no difference in depredation rates related to habitat.
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Article Abstract:
Nest failure in most bird species is caused by predation which affects yearly productivity and may influence population abundances. A new study, using artificial bird nests and Japanese quail eggs, investigates nest depredation rates in a large New Hampshire hardwoods forest and tests the theory that there are insignificant depredation differences among the forest strata. It is shown that nest placement is a strong determinant of depredation and the location of the nest in the forest strata is critical to nest survival.
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Article Abstract:
Habitat selection process of endangered bird species is examined by focusing on American Redstart's habitat selection process.
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