Comment Phenology and Climate Change (Score 2, Informative) 895
in the "what are you going to believe, your own eyes?" department...
Research in Phenology (the study of the seasonal changes of plant and animal life) shows significant advances in spring activity at points across the globe.
http://www.scienceonline.org/cgi/content/summary/sci;324/5929/887
http://www.ncbi.nlm.nih.gov/pubmed/15592880
http://www.seaturtle.org/PDF/Parmesan_2003_Nature.pdf
These are supplemented by anecdotal evidence - particularly in higher latitudes - that things are changing rapidly, and that surroundings are changing with in a generations living memory.
http://harvardmagazine.com/2002/11/the-great-global-experim.html