We will walk along the Charles River Esplanade from the Longfellow Bridge upriver looking for birds on both land and water. We hope to see a range of spring migrants as well as year round residents and birds setting up their breeding territories. Co-sponsored with the Charles River Esplanade Association.  Preregistration required on Esplanade Assn. website.  Meeting place and other details provided upon registration. See: https://www.eventbrite.com/e/guided-bird-tours-on-the-esplanade-tickets-265396256347.