From "A Man’s Leisure Time" in A Sand County Almanac:
The most glamorous hobby I know of today is the revival of falconry. It has a few addicts in America and perhaps a dozen in England – a minority indeed. For two and a half cents one can buy and shoot a cartridge that will kill the heron whose capture by hawking required months or years of laborious training of both the hawk and the hawker. The cartridge, as a lethal agent, is a perfect product of industrial chemistry. One can write a formula for its lethal reaction.
The hawk, as a lethal agent, is the perfect flower of that still utterly mysterious alchemy – evolution. No living man can, or possibly ever will, understand the instinct of predation that we share with our raptorial servant. No man-made machine can, or ever will, synthesize that perfect coordination of eye, muscle, and pinion as he stoops to his kill. The heron, if bagged, is inedible and hence useless (although the old falconers seem to have eaten him, just as a Boy Scout smokes and eats a flea-bitten summer cottontail that has fallen victim to his sling, club, or bow). Moreover the hawk, at the slightest error in technique of handling, may either ‘go tame’ like Homo sapiens or fly away into the blue. All in all, falconry is the perfect hobby.