Birds shrink

from 50 in America a scientific research conducted over 40 years on more bird species, the size of bird species in climate u revealed. Science people involved in research, migration over 40 years During the time, the birds paid by multiplying to buildings were examined and in time It was determined that birds are shrinking in size. [

Size shrinks blood Tags expanding

organ Ecology Letters]] by research; 1978 70 thousand 716 birds who died in Chicago until 2016 and dropped to the ground reviewed. Most retouched birds and in the cold regions of North America Based on 52 types of reviews that migrate to the south of the city of the winters kept. 2.6 percent in average body weights of bird species, leg It turned out to be 2.4 percent reduction in size. Without shrinking these sizes 1.3 percent increase in wing openings as welded. Science people from this result, we spent birds to fold ways of migration with smaller size thinking about power. The results of this regional research, world Among the information given in parallel with the results across the globe.

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[Researchers, dimensional in bird species shrink[ ‘Bergmann Act’] ] explains the scientific theory given. Home according to; lower than two bodies similar as shape than the larger volume have surface area and therefore less heat loss per mass Due to the fact that large bodies are in colder climates, small body tend to exist in warmer climates. For this reason, the temperatures are increasingly argues that the increase can lead to shrinking birds.