Bill Sheehan, local expert birder and Aroostook National Wildlife Refuge friends group member, provided the public with a second chance to learn about birds that inhabit the refuge.  The group consisted of both experts and amateur birders.  Bill concentrated the walk on a  division of the refuge that includes nearly 6 miles of trails for all visitors to enjoy.  Bill provided the group with tips on identifying birds by song as well as by sight when they could be located.