There are some observers of climate change who see the whole process as life-and-death. But they do not watch TV, or read blogs, or even listen to lobbyists for one viewpoint or another. They don't do CO2 concentrations, they don't even look at thermometers. These millions of first-hand observers go with what they see and feel and know based on everyday experience. For these observers it's a matter of life and death.
Many small songbirds now winter much further north than they did forty years ago. The Purple Finch has moved its range over 400 miles northward. Wild Turkeys, Mockingbirds, Cardinals, Pine Siskin--the list of northward moving American birds is a long one.
Here where I live in southern Oregon a number of birds that were once considered "Californian" are now regular all winter: Black Phoebe, California Towhee, White-tailed Kite, Red-shouldered Hawk, Anna's Hummingbird. I compare what I see now with what oberservers saw here forty years ago. Don't need a computer model for that. [poll id="201"]