Per the National Audubon Society, nation-wide studies over the past few years have demonstrated a significant decline in U.S. bird populations, especially those that inhabit grasslands; waterfowl species appeared to be least affected but have recently decreased in number. Habitat loss, pollution and severe weather events (courtesy of climate change) are among the most likely factors in this disturbing trend.
Aware of these studies, I was personally alarmed by the apparent dearth of white-throated sparrows in central Missouri this winter, especially in our neighborhood. Usually among the more common winter residents in our region, these Canadians arrive in October and generally stay until mid April.
But as we approach their usual departure week, I have been heartened by the frequency of their homesick tune, ringing through our yard. Perhaps my seasonal observations have been misleading but the study data is hard to ignore. Soon, in response to the lengthening days (though seemingly to the warming weather) the white-throats, fond of chilly conditions, will head north to their homeland.