Facilitation of sap-feeding birds by the white-fronted Woodpecker in the Monte Desert, Argentina

Article Abstract:

Sap consumption by White-fronted Woodpeckers in woodlands has been studied and interactions with other bird species using the resource, and seasonal variations in sap exploitation were considered. Smaller bird species spent less time feeding on sap due to aggression by White fronted Woodpeckers, suggesting that the Woodpeckers actively compete for the resource. However the other bird species can take advantage of the resource that would otherwise be unavailable.

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Heat production and evaporative water loss of Dune Larks from the Namib desert

Article Abstract:

The hypotheses that Dune Larks have a reduced basal metabolic rate (BMR) and decreased total evaporative water loss (TEWL) to conserve water, were tested. There was no evidence to suggest that the birds have a reduce BMR. It is suggested that they have an elevated BMR as they live in a cool environment in winter, mandating significant metabolic machinery for thermogenesis. Metabolic water production may be significant in water economy.

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Breeding biology of Gray-Crowned Tyrannulet in the Monte Desert, Argentina

Article Abstract:

Nests of Gray-crowned Tyranulet (tyrant flycatcher) in open woodlands of the central Monte desert, were observed. Breeding occurred from October to January and nests are small open cups, with both parents taking part in nest building. Hatching was asynchronous and nesting lasted 13-14 days. The main cause of nest failure was egg and nestling predation.

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