"I do not and cannot ever know the combination of happiness, hunger, or emotions that energize a bird. But whenever I've watched kinglets in their nonstop hopping, hovering, and searching, seen their intimate expressions, and heard their constant chatter of tsees, songs, and various calls, I've felt an infectious hyperenthusiasm flow from them, and sensed a grand, boundless zest for life. They could not survive without that in their harsh world. Like us, they are programmed for optimism."
– Bernd Heinrich, Winter World: The Ingenuity of Animal Survival
Photo: Westchester Woods, January 2015