Participants on the "Spring Ducks to Draughts" tour sample beers at Oxbow Brewing Company in Newcastle following a morning of birding on Merrymeeting Bay in Bowdoinham. Freeport Wild Bird Supply and the Maine Brew Bus have teamed up to offer the tours.

A group of birders disembarks from the Maine Brew Bus as part of the "Birds on Tap" tour, a road trip combining birding with stops at local brew pubs.

Derek Lovitch, far right, leads a group along a road in Bowdoinham as they seach for wood ducks during a "Birds on Tap" tour.

Anne Meadows, left, of Maryland, and her daughter Kate McCarty of Portland scan Merrymeeting Bay on the lookout for ducks and other birds.

American black ducks and Northern pintails take flight over Merrymeeting Bay in Bowdoinham.

Derek Lovitch, right, describes a variety of waterfowl seen on Merrymeeting Bay to participants of the "Birds on Tap" series.

Birders listen to information about the brewing process at Oxbow Brewing Company following a morning of birding.

Al DiSabatino of Freeport samples beer at Oxbow Brewing Company in Newcastle.