Winter dynamics:Birds to look for in the season between migrations

摘要

Winter is anything but static. Yes, fall migration is for the most part over, and spring migration is pretty lean until March, when northbound waterfowl drive a wedge or a "V" into winter. But in winter, many birds are constantly shifting in responseto food needs, opportunities, and territorial prerogatives, not to mention weather.Consider the Common Redpoll. Here in southern New Jersey, I have seen thousands of redpolls coming in off the Atlantic Ocean in February. Presumably, the birds faced depleted food stocks elsewhere and were driven south in search of untapped resources.