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Conspicuousness, not colour as foraging cue in plant–animal signalling
TLDR
It is hypothesized that conspicuousness determines avian food selection and the contrast hypothesis is defined, which states that diurnal dispersers select fruit colours based on their conspicuousness and not their colour itself.
Discrimination abilities for nutrients: which difference matters for choosy birds and why?
TLDR
Tanagers' consistent choices in the experiments with foods of different energy density are interpretable by both ODT and the nutrient regulation theory, however, only the latter accounts for the birds' choices of isocaloric foods differing in macro- or micronutritional content.
Detectability and content as opposing signal characteristics in fruits
TLDR
Plants may employ differential signalling strategies matching conspicuous signals in red and black fruits while other colours signal fruit quality, which implies that nutrient quality and fruit defence are communicated visually.
Testing the defence trade-off hypothesis: how contents of nutrients and secondary compounds affect fruit removal
TLDR
Fruit removal was characterised by the nutrient content hypothesis and pulp contents by the removal-rate model and the consistency of consumers’ preferences implies the potential for habitat shaping processes due to differential recruitment of plant species based on dispersers’ choices.
Vertical Stratification and Caloric Content of the Standing Fruit Crop in a Tropical Lowland Forest1
TLDR
The results of a four-month study on the seasonality and vertical distribution of the standing fruit crop within a tropical forest during the dry season in southern Venezuela found a broader range of fruit sizes than in the forest below 12 m, and small-sized fruits were distributed in the understory and in the canopy but were nearly absent from the mid-story.
Unlearned preference for red may facilitate recognition of palatable food in young omnivorous birds
TLDR
Unlearned colour choices by consumers should be interpreted in a broader context of foraging and not only to explain warning coloration, as red colour is a contextdependent stimulus and might facilitate food recognition in inexperienced fruit-eating birds.
Spatial behaviour in the Aquatic Warbler (Acrocephalus paludicola) during mating and breeding
TLDR
It is concluded that Aquatic Warblers are not territorial in the breeding season, as no constant ranges were observed and home ranges of different females overlapped by up to 20 %.
Cowbird parasitism of Pale-headed Brush-finch Atlapetes pallidiceps: implications for conservation and management
TLDR
Nest monitoring and cowbird egg removal would enable the study of the distribution of parasitism in relation to landscape and vegetation variables, whereas cowbird shooting and nest monitoring might provide a larger short-term benefit to reproductive output.
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