Songbird community composition and nesting success in grazed and ungrazed pinyon-juniper woodlands

Article Abstract:

Pinyon-juniper woodlands are among the least studied livestock grazing habitats, despite their dominance in the western US where they occupy more than 85 million ha. Almost nothing is known about the interaction between grazing and the birds that occupy such systems. A new study compares the community composition and nesting success of songbirds within actively grazed pinyon-juniper woodlands with similar woodlands where livestock has been excluded. Parasitism by the brown-headed cowbird, often associated with livestock, is seen to be an important constraint on the nesting activity of some birds.

Natural history, Habitats, Birds, Grazing, Pinyon pines, Pinon pines

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Long-distance movement of a white-tailed deer away from a chronic wasting disease area

Article Abstract:

Long distance movements of deer, present opportunities for diseases like chronic wasting disease to spread rapidly. Transmission will occur if the deer is infected, shedding, and makes direct contact with other deer.

Illinois, White-tailed deer, Animal behavior, Animals, Animal dispersal, Animal diseases, Animal behaviour

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Reproductive costs of commuting flights in brown-headed cowbirds

Article Abstract:

Bird pest management strategies are drawn from research on flight energy cost impacts on cowbird populations. Cowbirds flying longer distances for brood parasitism demonstrated reduced egg-laying rates.

New Mexico, Measurement, Physiological aspects, Bird populations, Bird flight, Bird control

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