Tropical Birds Wallpaper

Tropical Birds Wallpaper Biography
Generally birds follow the facetious advice often given to pilots -- "fly low and slow." Most cruise speeds are in the 20-to-30-mph range, with an eider duck having the fastest accurately clocked air speed of about 47 mph. During a chase, however, speeds increase; ducks, for example, can fly 60 mph or even faster, and it has been reported that a Peregrine Falcon can stoop at speeds of 200 mph (100 mph may be nearer the norm). Interestingly, there is little relationship between the size of a bird and how fast it flies. Both hummingbirds and geese can reach roughly the same maximum speeds

Perhaps the most ingenious experiment on avian badges involved the European Great Tit, a close relative of North American chickadees and titmice (all are members of the same genus, Parus). This species has a dark cap, white cheeks, and a dark breast stripe/bib. Torbiorn Järvi and Marten Bakken of Norway's University of Trondheim used radio-controlled motorized stuffed birds at a feeder to test the efficacy of the breast stripe as a badge. When a Great Tit approached the feeder, the stuffed bird could be rotated to face the incoming individual and to perform a "head-up" aggressive display. When, and only when, the stuffed bird had a breast stripe wider than that of the incoming bird was the latter frightened away.

Tropical Birds Wallpaper

Tropical Birds Wallpaper

Tropical Birds Wallpaper

Tropical Birds Wallpaper

Tropical Birds Wallpaper

Tropical Birds Wallpaper

Tropical Birds Wallpaper

Tropical Birds Wallpaper

TROPICAL BIRDS

Sri Lanka National Zoological Gardens Dehiwala