Show irrigation helps birds bird cultivation of large areas of fertile lan land under dunder irrigation has worked magic witt with the bird population in colorado says nature magazine whore where zo SO years ago the dry prairies supported only small numbers of tile the arid land birds wide ide stretches of verdant green fields now furnish ideal homes for numbers of brewers blackbirds mourning doves several varieties of sparrows nind swallows and an abundance of the resplendent ring necked pheasant an introduced species |