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Parental investment in nest defence by stonechats (Saxicola torquata)
Abstract Breeding stonechats ( Saxicola torquata ) made mixed sequences of two calls when a human intruder entered territories. ‘Whits’ are modulated notes with a small frequency range, and inExpand
THE FORMATION, STRUCTURE AND FUNCTION OF MIXED-SPECIES INSECTIVOROUS BIRD FLOCKS IN WEST AFRICAN SAVANNA WOODLAND
SUMMARY Mixed-species flocks of birds were observed during the wet season (July to September 1975) in savanna woodland in Ghana. Thirty-four flocks contained birds of 56 species in 20 families,Expand
The Effects of Social Learning On the Food Choice of the House Sparrow (Passer Domesticus)
The effects of social feeding on the selection of novel coloured food and food intake by house sparrows (Passer domesticus) were studied in three experiments. In the first experiment, birds wereExpand
Dispersal between nest-sites by Stonechats Saxicola torquata in relation to previous breeding success
Distances between nest-sites used successively within a breeding season were measured in a population of Stonechats. The frequencies and consequences of dispersing different distances were examinedExpand
Seasonal patterns of song production by male Stonechats Saxicola torquata
Adult male Stonechats Saxicola torquata sang frequently while occupying exclusive breeding territories. Singing in the population started one month before nesting, when territorial disputes were mostExpand
Mechanisms of food size selection by bullfinches (Pyrrhula pyrrhula L.) feeding on sunflower seeds
Abstract Size-selective feeding is usually discussed in relation to ‘optimal diet’ models, which provide no indications of mechanisms of choice. In a series of experiments, captive bullfinches wereExpand
Effects of colour on the aversions of starlings and house sparrows to five chemical repellents
Abstract Captive starlings (Sturnus vulgaris) and house sparrows (Passer domesticus) were given choices between untreated turkey crumbs, and similar food treated with one of five chemical repellentsExpand
Bud‐eating by bullfinches, Pyrrhulapyrrhula in relation to the chemical constituents of two pear cultivars
SUMMARY Damage to pear trees of the cultivars Conference and Doyenne du Cornice caused by Bullfinches feeding on the flower buds was measured during January-April 1981. Bud-eating was concentratedExpand
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