On breeding performance, colony growth and habitat selection in Buff-necked Ibis

Article Abstract:

An important factor in the selection of habitat in Buff-necked Ibis (Theristicus caudatus) is the reproductive success of conspecifics. J.A. Donazar et al. presented data suggesting that breeding parameters did not vary significantly across colony substrata. However, an alternative interpretation of the data is possible. Rate of growth of colonies is correlated with reproductive success as indicated by brood size. Greater reproductive success in a previous year would attract more birds the following year and increase the colony size.

Birds, Ibis, Ibises, Animal reproduction

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Habitat selection by Northern Spotted Owls: the consequences of prey selection and distribution

Article Abstract:

Northern Spotted Owls have been found to select habitat, as well as foraging sites, according to the abundance of prey. Such a pattern of prey and site selection seems to provide the owls with energetic benefit. Owls also choose to forage at late seral forest edge sites, where dusky-footed woodrats are most abundant. The owl's affinity for these types of forests may be then explained by the energetic benefit that it gains from the selection of woodrats.

Habitats, Predation (Biology), Spotted owl, Spotted owls

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