The Society for the Protection of New Hampshire Forests and the Ammonoosuc Chapter of NH Audubon will host noted wildlife biologist Ben Kilham for a presentation about black bears at The Rocks February 21. A renowned black bear researcher and Lyme, N.H., resident, Kilham has shared his knowledge about bears with more than 40,000 people through his lectures. His new slide show is based on the social relationships within the black bear society.