منابع مشابه
Supplementary feeding restructures urban bird communities.
Food availability is a primary driver of avian population regulation. However, few studies have considered the effects of what is essentially a massive supplementary feeding experiment: the practice of wild bird feeding. Bird feeding has been posited as an important factor influencing the structure of bird communities, especially in urban areas, although experimental evidence to support this is...
متن کاملAn Experimental Design for Investigating Winter Bird Depredation at South Texas Feedlots
INTRODUCTION Large aggregations of birds concentrating around livestock feedyards during fall and winter months have been a common occurrence in many parts of the country (Besser et Extensive utilization of livestock feedyards by these flocking birds has been reported to result in economic losses to the feedyard operator due to feed consumption. In Colorado, seasonal feed losses to starlings ob...
متن کاملUrban Bird Feeding: Connecting People with Nature
At a time of unprecedented biodiversity loss, researchers are increasingly recognizing the broad range of benefits provided to humankind by nature. However, as people live more urbanized lifestyles there is a progressive disengagement with the natural world that diminishes these benefits and discourages positive environmental behaviour. The provision of food for garden birds is an increasing gl...
متن کاملWinter Feeding Intensity of Narwhals (monodon Monoceros)
Stomach contents from 121 narwhals (Monondon monoceros) harvested in the eastern Canadian High Arctic and West Greenland were used to quantify seasonal changes in feeding activity and prey selection. Stomachs collected from summer harvests were mostly empty with little evidence of recent feeding. Stomachs collected in late fall and winter harvests had considerable amounts of undigested material...
متن کاملWinter and Summer Bird Communities of Twin Cays , Belize
Avian species richness and abundance were studied in order to characterize the bird fauna of Twin Cays, Belize. Auditory and visual surveys were conducted for both migratory and resident species during winter and summer seasons. The Mangrove Yellow Warbler was the most common bird species on the islands in both seasons, with an estimated mean density of 13.4 birdsha during the winter and 10.9 b...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1970
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay4198