The 27th annual Great Backyard Bird Count started Friday morning, and throughout the weekend, bird enthusiasts across Canada will be looking to help biologists track bird movements this winter.While the effort put in by any individual can be minimal, as little as 15 minutes, the overall contribution of the event to science is huge, says Samantha Knight, Atlantic stewardship manager with Nature Conservancy of Canada."It takes a big community effort to gather the data needed to understand those population trends," said…
