flock

Article content ABBOTSFORD, B.C. — Avian flu has been found in a commercial flock in the Fraser Valley, the same area where 80 per cent of British Columbia’s poultry farms are located. Article content B.C.’s Ministry of Agriculture says in a statement the infected farm has been placed under quarantine by the Canadian Food Inspection Agency and producers within a 10-kilometre radius have been sent notices about the discovery. Previous outbreaks in the Fraser Valley have prompted culls of millions of birds, although…

Experimental evidence on starling flocks. a The equal-time space correlation function of the speed fluctuations (for the definition of the correlation function see the “Methods” section), plotted against the distance r between the birds rescaled by the flock’s size L, for some typical flocks (each color corresponds to a different flock); the fact that all the curves collapse onto each other indicates that the spatial range of the speed correlation,…