Reasons why predators cannot be inferred from nest remains

Article Abstract:

Researchers often identify nest predators by the appearance of egg and nest remains and it is a popular field procedure. But a new study analyses the method and finds that nest predators cannot be inferred from nest remains because of several biases, such as inter-specific variations in patterns of nest destruction and unexpected predators. Methods which rely on objective rather than subjective results should be used instead.

Identification and classification, Predatory animals

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Effects of time and nest-site characteristics on concealment of songbird nests

Article Abstract:

Concealment at the nests of three old-field songbird species was investigated to determine the influence of time and nest-site characteristics and differences in concealment in parasitized, nonparasitized, depredated and fledged nests. Nests ultimately lost their concealment after some time. Mean and minimum concealment was not related to the occurrence of predation or brood parasitism for any of the three bird species.

Parasitism, Habitat selection

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Interactive effects of vegetation and predators on the success of natural and simulated nests of grassland songbirds

Article Abstract:

Research is presented concerning the influence of vegetation and predation by small mammals and ground squirrels on the success of both simulated and natural songbird nests situated in the grasslands of North Dakota.

Environmental aspects, Grasslands

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