text: Noting that "in summer, 51 of 65 breeding species had negative slopes of mass against year, 20 of 26 wintering species had negative slopes, 60 of 83 spring migrants had negative slopes, and 66 of 75 autumn migrants had negative slopes," Van Buskirk et al . conclude that their results "offer compelling evidence that climate change has already produced observable adaptive shifts in morphology, behavior, and phenology of a great many species," as, we might add, birds do what they need to do to successfully cope with the climate changes they encounter, which according to the world's climate alarmists have been unprecedented over the past one to two millennia. Yes, birds do it ... and they do it fast , and they do it well .