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Why doesn't such-and-such game bird do well in Nebraska? This is a question which is often asked field workers for the game department. The answer to such an inquiry varies with the bird in question, but in general the following applies: Since climate, topography, and natural foods vary so much from place to place, and since most individual species are not highly adaptable, nature has through the centuries evolved many species, or kinds, of birds, each species adapted to meet certain conditions. Some of these have extensive ranges; others are limited in their distribution. The conditions suited to one species of bird are complicated, and usually not readily evident to man, but nevertheless they definitely limit the distribution of the species.
Birds do not have the power to change their surroundings and simply do not live where the necessary conditions are lacking. Thus it may be seen that a bird, placed in an area different from that to which nature has fitted it to live, has a poor chance of surviving. In general, if a bird is not native to a particular set of conditions it is not likely to thrive under those conditions.