To Caleb Chaplin, it’s clear what sets a patch of old forest on his family’s land in Naples apart from the woods around it. …Some of the trees are up to 200 years old. Foresters call these woods “late successional and old growth.” They’re also some of the rarest features on Maine’s landscape, trap lots of greenhouse gas and provide critical habitat for unique species. Chaplin said his family was planning to harvest the stand this year. …Then they learned the New England Forestry Foundation would pay them to delay harvesting. Chaplin said it was a tough decision at a time when these big trees are drawing some of the highest prices in the timber market. Ultimately, the family agreed to leave the stand alone for 10 years, and work with the foundation to develop a permanent conservation plan.