Bill Benner, veterinarian, birder, and butterfly gardener, is a man with many strings to his bow, but they all play tunes of the natural world and its fragility. He will be talking about the natural world, climate change and the impact it has on our own part of Massachusetts at GreenfieldCommunity College’s Senior Symposium on Tuesday, March 10 from 2-4 pm. As a young man Benner attended CornellUniversity because of their ornithology lab. “I just wanted to study…