AllAboutBirds online guideAllen Bird Club birding localesAmerican Birding AssociationAudubon: National Audubon SocietyBreeding Bird Atlas ExplorerBrookline Bird ClubChritmas Bird Count – NorthamptonCornell Lab of OrnithologyEastern Mass Hawk Watch – Watatic presentation by Brian Rusnica January 2020eBird home pageMurmuration Project-Western Mass hotspotsHitrchcock Center for the EnvironmentHoffman Bird ClubHBC LibraryKestrel Land TrustManomet Bird ObservatoryMassachusetts Audubon SocietyMassbird: all about birding in MassachusettsMurmuration Project-Western Mass e-bird hotspots – open source spreadsheet, Corey EloweNorth East Hawk WatchNorth American Bird Sounds – Naturesongs.comNorthfield Bird ClubSilvio Conte National Fish & Wildlife RefugeHBC Boutique