Eurasian Tree Sparrow
Passer montanus

f8 @ 1/1250s, ISO:800, Nikon D300S w 500mm


"Eurasian Tree Sparrow," Wikipedia, the free encyclopedia.The Eurasian Tree Sparrow (Passer montanus) is a passerine bird in the sparrow family with a rich chestnut crown and nape, and a black patch on each pure white cheek. This sparrow is distinctive even within its genus in that it has no plumage differences between the sexes; the juvenile also resembles the adult, although the colours tend to be duller. Its contrasting face pattern makes this species easily identifiable in all plumages; the smaller size and brown, not grey, crown are additional differences from the male House Sparrow. Adult and juvenile Eurasian Tree Sparrows undergo a slow complete moult in the autumn, and show an increase in body mass despite a reduction in stored fat. The change in mass is due to an increase in blood volume to support active feather growth, and a generally higher water content in the body.
Hokkaido, Japan
 
02/24/2012