The effectiveness of tape playback in estimating black rail density

Article Abstract:

Research undertaken among black rails at two sites in Florida has sought to establish how effective tape playback is in estimating the density of these secretive birds. It was found that the probability of a response from a black rail is affected by distance from the playback source, time of the survey, breeding stage and sex. It is advisable that future studies using playback surveys do not present estimates of absolute density. Playback surveys along fixed routes giving a simple index of abundance would be valuable in monitoring populations over wide areas.

Models, Ornithological research

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California black rail use of habitat in southwestern Arizona

Article Abstract:

The habitat selection behavior of the California black rail was investigated. Specifically, 36 radio-tagged animals at Mittry Lake Wildlife Area, AR, were studied between Mar. 1987 and Dec. 1988. The results showed that the animals selected areas filled with giant bulrush regardless of season. This indicates that habitat structure is a more reliable indicator of a California black rail's habitat than plant composition.

Arizona, Natural history, Habitats, Animals, Habitat selection

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Effects of disturbance on activity and energy budgets of migrating waterbirds in south-central Oklahoma

Article Abstract:

Human recreational activities accounted for more than 85% of disturbances of waterfowl at Oklahoma's Cumberland Pool, Tishomingo National Wildlife Refuge, while natural disturbances accounted for less than 10%. Disturbances are converted into energy expenditures; implications for bird body condition and wildlife conservation efforts are discussed.

Strategy & planning, Science & research, Oklahoma, Planning, Behavior, Environmental aspects, Human beings, Human-environment interactions, Birds, Protection of, Bird conservation, Waterfowl, Bird refuges, Bird sanctuaries, Company business planning

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