Birdiest City retained because watchers knew what counted. More than 60 local bird watchers hatched a strategy for their successful defense of Corpus Christi's title as America's Birdiest City. On the weekend of April 24-25, they deployed to places where they knew they would spot a lot of birds. Outnumbered, they faced 100 pairs of binoculars in New York City and 80 pairs in San Diego, Calif., said local Audubon Outdoor Club member Bob Craeglow. But they outcounted what counted: 246 verifiable species to San Diego's 209 and New York's 190. "I think Birdiest City is a point of pride,...