منابع مشابه
A Flock Is Not a Bird Agents and Beyond :
a flock of birds sweeps the sky. One moment they are circling, another they dart to the left or drop to the ground. Each move is so beautiful that it appears choreo-graphed. Furthermore, the movements of the flock seem smoother than those of any one bird in the flock. Yet, the flock has no high-level controller or even a lead bird. The phenomenon is a result of what is often called " self-organ...
متن کاملWhy is timing of bird migration advancing when individuals are not ? Jennifer A . Gill
School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK Conservation Science Group, Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK British Trust for Ornithology, The Nunnery, Thetford, Norfolk IP24 2PU, UK Farlington Ringing Group, Solent Court Cottage, Chilling Lane, Warsash, Southampton SO31 9HF, UK South Icel...
متن کاملBird Mite Infestation
Mites in the genus Dermanyssus are external parasites of birds, rodents and other mammals. The most common member of this group is the Chicken Mite that infests poultry roosts and wild bird nests. The chicken mite feeds primarily at night when the birds return the nest or roast area. They hide during the day in nearby cracks, crevices and other protected sites. These mites are known to infest h...
متن کاملWhy is timing of bird migration advancing when individuals are not ? Jennifer
School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK Conservation Science Group, Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK British Trust for Ornithology, The Nunnery, Thetford, Norfolk IP24 2PU, UK Farlington Ringing Group, Solent Court Cottage, Chilling Lane, Warsash, Southampton SO31 9HF, UK South Icel...
متن کاملWhy is timing of bird migration advancing when individuals are not?
Recent advances in spring arrival dates have been reported in many migratory species but the mechanism driving these advances is unknown. As population declines are most widely reported in species that are not advancing migration, there is an urgent need to identify the mechanisms facilitating and constraining these advances. Individual plasticity in timing of migration in response to changing ...
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ژورنال
عنوان ژورنال: Nature
سال: 1998
ISSN: 0028-0836,1476-4687
DOI: 10.1038/31576