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Prey Selection by Sparrowhawks, Accipiter nisus: Relative Predation Risk for Breeding Passerine Birds in Relation to their Size, Ecology and Behaviour
Most predation was due to the smaller male hawks, providing food for their mates and young, RPR increased with prey body size up to a mass of about 40 g, then declined with increasing body size (larger prey being more difficult to catch), RPR decreased with increasing relative density of prey species.
The Effects of Investigator Disturbance on Nesting Birds
To learn about the behavior and ecology of nesting birds, we often study them when they occupy nesting territories. But by visiting territories or nests, the investigator may to a greater or lesser
Browsing damage on broadleaved trees in semi-natural temperate forest in Sweden, with a focus on oak regeneration
Absence of, or poor, oak (Quercus spp.) regeneration is a problem in uneven-aged, mixed closed-canopy broadleaved forests. Browsing by ungulates on small trees may contribute to poor oak regeneration
Annotated checklist of fungus gnats from Sweden (Diptera: Bolitophilidae, Diadocidiidae, Ditomyiidae, Keroplatidae and Mycetophilidae).
The first modern Swedish checklist of fungus gnats of the families Bolitophil Families, Diadocidiidae, Ditomyiidae, Keroplatidae and Mycetophilidae is presented and three species names are reinstated to preserve nomenclatural stability.
Nest site selection : a trade-off between concealment and view of the surroundings ?
For artificial nests, the risk of predation decreased when nests were more concealed within individual trees, but Song Thrushes did not maximize concealment of nests within trees but selected intermediate concealment from the range of concealment available.