Water jewels: What every birdwatcher needs to know to understand our best-known and most charismatic birds

摘要

Waterfowl have to be among the best known and most fascinating birds. They range from large, elegant swans to small, colorful teal. Their flights in both spring and fall are spectacular and awe-inspiring. And for many birdwatchers, the true harbingersof spring aren't crocuses or tulips but skeins of highflying Canada Geese.