AllAboutBirds online guide Allen Bird Club birding locales American Birding Association Audubon: National Audubon Society Breeding Bird Atlas Explorer Cornell Lab for Ornithology Eastern Mass Hawk Watch – Watatic presentation by Brian Rusnica January 2020 eBird bird logging website Kestrel Land Trust list HBC Library Manomet Bird Observatory Massachusetts Audubon Society Report Cliff Swallow Sightings! Massbird: all about birding in Massachusetts North East Hawk Watch North American Bird Sounds Silvio Conte F. & W. Refuge Western Mass Birding Hotspot Maps HBC Boutique
