Flocking birds loose structure to keep air, can heat insulation, heat escapes from birds, as well as the water activities in the birds provide buoyancy. The temperature fluctuations change from year birds normally will change after MAO in the autumn to produce more flocking birds. There is evidence that in some cluster nesting birds, flocking birds can reduce the incidence of chicks to kill each other, because the hardness of the feather is too big to swallow that bird. Pollutants can reduce the efficiency of these functions, for example, when flocking birds with oil, flocking birds around into pieces, which will reduce the heat insulation effect and make water comes into contact with the skin.winterparka Because birds can rule out the feathers heavy metals, and feathers can not to kill birds to collect and indefinitely, so flocking birds kept can be used to detect birds living environment without metal pollutants. Research shows that the food of birds of a feather and metal pollutant present a high correlation, among them the chemicals in the feather proportion remained relatively static, and the proportion of certain kinds of metal will remain relatively high level.winterparka

winterparka (last edited 2011-09-10 04:04:16 by Fate5858)