Global warming is changing the seasonal behavior of plants and animals. Increased average spring temperatures result in earlier flowering dates for a variety of plant species. For each 1°C rise in mean spring temperature, plants flower an average of 3.2 days earlier in Massachusetts and 4.1 days earlier in south-central Wisconsin.

SOURCE: Ellwood, E. R., et al. (2013) Record-breaking early flowering in the eastern United States. PLOS ONE 8(1):e53788.