Dear Umbra, Is there a national increase in the crow population, or am I just noticing them more as I age? JimLa Jolla, Calif. Dearest Jim, Probably both. I'll wager that you have become more observant as the years pass, but it's also the case that, according to various bird counts and surveys, the American crow population is indeed expanding -- although not in all parts of the country. Industrial agriculture provides little friendly habitat in the way of perches, food, and shelter. On the other hand, these social, clever birds are doing a fine job of adapting to life …
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