Daniel Webster Wildlife Sanctuary

WALK FOR WILDLIFE 2015 -- Images from Mass Audubon South Shore Sanctuaries' fun and successful 30th Annual Walk for Wildlife.

This tree is sporting quite a burl. This is a spot where insects burrowing into the bark cause a tree to react by growing a protective bump, somewhat like a scab forms on human skin.

42 / 63

This tree is sporting quite a burl. This is a spot where insects burrowing into the bark cause a tree to react by growing a protective bump, somewhat like a scab forms on human skin.