Recruitment in Rocky Mountain greater sandhill cranes and comparison with other crane populations

Article Abstract:

Data on the recruitment of sandhill cranes was collected to study its reproductive characteristics to sustain harvests and responses to wildlife management projects. Specifically, age ratio and brood size were obtained for the sandhill cranes belonging to the Rocky Mountain Population and the Lower Colorado River Valley Population as well as for the lesser sandhill cranes belonging to the Midcontinent Population. The data showed the whooping crane to have the highest long-term recruitment behavior.

Natural history, Bird populations, Whooping crane, Rocky Mountains

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Evaluating habitat quality for the dusky flycatcher

Article Abstract:

The dusky flycatcher (Empidonax oberholseri) was studied at 8 sites in central Idaho, USA, to investigate relationships among vegetation cover, density of breeding conspecifics, and indicators of habitat quality. It experienced raised reproductive success where it bred at the highest densities, but the relationships between nesting success, annual reproductive success, number of fledgings per hectare, and amount of understory cover indicated considerable annual variation.

Sexual behavior, Environmental aspects, Tyrant flycatchers

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Sandhill crane abundance and nesting ecology at Grays Lake, Idaho

Article Abstract:

The examination of population size and factors influencing nest survival of greater sandhill cranes at Grays Lake National Wildlife Refuge, Idaho suggest that nest survival could best be enhanced by managing spring water levels.

Physiological aspects

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