Is The Allen's Hummingbird in Peril, Or Doing Just Fine?

It's winter in North America, but you wouldn't know it in Southern California. In many Los Angeles backyards, Allen's hummingbirds bask in the sunshine as they prepare their nests. To the north, in Seattle, backyards are blanketed in a layer of fluffy white snow. The trees have shed their leaves. Most of the birds that call this city home are hunkering down, waiting for springtime warmth.