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The Function of the Alula in Avian Flight
This work has found the first experimental evidence that the alula functions as a vortex generator that increases the lift force and enhances manoeuvrability in flights at high angles of attack. Expand
Wild birds recognize individual humans: experiments on magpies, Pica pica
The magpie is only the third avian species, along with crows and mockingbirds, in which recognition of individual humans has been documented in the wild, and a new hypothesis is proposed that frequent previous exposure to humans in urban habitats contributes to the ability of birds to discriminate among human individuals. Expand
Exploitation of an Ancient Escape Circuit by an Avian Predator: Prey Sensitivity to Model Predator Display in the Field
It is shown that contrasting patterns within the plumage are crucial to foraging success, as is contrast of the bird against a background, and visual motion also significantly contributes to the successful flushing. Expand
Camouflage through an active choice of a resting spot and body orientation in moths
The study demonstrates that the evolution of morphological adaptations, such as colour pattern of moths, cannot be fully understood without taking into account a behavioural phenotype that coevolved with the morphology for increasing the adaptive value of the morphological trait. Expand
A rare predator exploits prey escape behavior: the role of tail-fanning and plumage contrast in foraging of the painted redstart (Myioborus pictus)
This is the first experimental study of morphological and behavioral adaptations of a rare predator that both elicits and exploits antipredator escape behavior of its prey against more common predators. Expand
Variation in diet of Tawny Owl Strix aluco L. along an urbanization gradient
The diet of Tawny Owl as a function of urbanization was studied in Central Poland in 1976-1984 and it is concluded that the owls were able to exploit locally abundant prey from a variety of habitats. Expand
Sensory exploitation of prey: manipulation of the initial direction of prey escapes by a conspicuous 'rare enemy'
  • P. Jabłoński
  • Biology, Medicine
  • Proceedings of the Royal Society of London…
  • 22 May 2001
It is proposed that the pivoting movements of flush pursuers direct insect escapes across the central field of vision of a predator, where it is easier to track and intercept the prey. Expand
Producer-scrounger roles and joining based on dominance in a free-living group of Mexican jays (Aphelocoma ultramarina)
It is shown that Mexican jays use PS roles and that these roles were consistent through many trials, but might have changed between trial sets, and dominance influenced joining in that joining was more likely to occur between birds with a larger difference in their dominance rank. Expand
Effect of Incubation on Bacterial Communities of Eggshells in a Temperate Bird, the Eurasian Magpie (Pica pica)
It is found that total bacterial abundance increased and diversity decreased on incubated eggs while there were no changes on non-incubated eggs, suggesting that avian incubation in temperate regions may promote the growth of harmless (or benevolent) bacteria and suppress thegrowth of pathogenic bacterial taxa and consequently reduce the diversity of microbes on the egg surface. Expand