Publications
Technical Publications
Ask the Biologist Bob's outdoor tips on Yamaha

Dinsmore, S. and R.C. Humphrey. 1987. A Wilson's Plover (Charadrius wilsonia) on North Monomoy Island. Bird Observer of Eastern Massachusetts. 14(5). 

Holt, D.W., J.P. Lortie, and R.C. Humphrey. 1984. An Inventory of the Breeding Birds of Monomoy National Wildlife Refuge, Chatham, Massachusetts 1984. Bird Observer of Eastern Massachusetts. 12(1): 53-57. 

Holt, D.W., J.P. Lortie, B.J. Nikula and R.C. Humphrey. 1986. First Record of a Common Black-headed Gull Breeding in the United States. Am. Birds. Vol 40(2). 

Holt, D.W., R.C. Humphrey and J.P. Lortie. 1987. The Mammals of Monomoy National Wildlife Refuge. The Cape Naturalist. 15(4):63-69. 

Humphrey, R.C. 1985. The American Oystercatcher on Monomoy National Wildlife Refuge. The Cape Naturalist. 14(1):20-23. 

Humphrey, R.C. 1987. Evaluation of Gull Control Methods on Monomoy National Wildlife Refuge Since 1984. USFWS Refuge Manage. Study.

Humphrey, R.C. 1987. Range Expansion and New Breeding Record for the Glossy Ibis in Massachusetts. Bird Observer of Eastern Massachusetts. 15(4)173-177. 

Humphrey, R.C. 1987. Animal Control Plan. Parker River National Wildlife Refuge. USFWS Refuge Manage. Study. 

Humphrey, R.C. 1988. Affected Environment. in Environmental Assessment, Master Plan for Monomoy National Wildlife Refuge, Chatham, Massachusetts. U.S. Dept. of Interior, Fish and Wildlife Service, Region 5. Newton Corner, Massachusetts. 

Humphrey, R.C. 1988. Ecology and Management of American Oystercatchers on Monomoy National Wildlife Refuge. USFWS Refuge Mange. Study. 

Humphrey, R.C. 1988. Ecology and Range Expansion of American Oystercatchers in Massachusetts. M.S. Thesis. Department of Forestry and Wildlife. University of Massachusetts, Amherst. 

Humphrey, R.C. 1989. Observations on Cooperative Mobbing of a Bald Eagle. J. Raptor Res. Vol 23(2). 

Humphrey, R.C. 1990. A System for Assessing Shorebird Roosting and Feeding Sites in the State of Maine. Technical Report submitted to Maine Department of Economic and Community Development. 

Humphrey, R.C. 1992. Response Plan for Oil Spill-Damaged Wildlife Rehabilitation in the State of Maine. DRAFT. Maine Department of Inland Fisheries and Wildlife. Augusta, Maine.

Humphrey, R.C. 1993. An Evaluation of Compliance with Maine's Natural Resources Protection Act. Maine State Planning Office, Augusta, Maine. 

Humphrey, R.C. 1996. An Assessment of the Relative Value and Diversity of Wetlands on Sears Island, Searsport, Maine. Maine Department of Environmental Protection, Augusta, Maine. 

Humphrey, R.C., J.P. Lortie, and J.L. Royte. 1995. Seasonal occurrence of shorebirds at Biddeford Pool, Maine. Maine Naturalist. 

Humphrey, R.C. and J.L. Royte. 1990. A System for Assessing Black Racer Habitat in the State of Maine. Technical Report submitted to Maine Department of Economic and Community Development.

Lortie, J.P., D.W. Holt, and R.C. Humphrey. 1985. Evaluation of gull control methods used on Monomoy National Wildlife Refuge, Massachusetts, 1980-1984. USFWS Refuge Manage. Study. 

Lortie, J.P., R.C. Humphrey, and D.W. Holt. 1990. Gull Control Methods Used on Monomoy National Wildlife Refuge, Massachusetts, 1980-1984. Abstracts, 46th Annual Northeast Fish and Wildl. Conf. 

Nol, E. and R.C. Humphrey. 1994. American Oystercatcher. In The Birds of North America, No. 2 (A. Poole, P. Stettenheim, and F. Gill, Eds.) Philadelphia: The Academy of Natural Sciences: Washington, DC: The American Ornithologists' Union. 

Parkin, D.O. J.P. Lortie, R.C. Humphrey and F.J. DiBello. 1990. The Maine Lakes Study, A Statewide Inventory of Maine Lakes. Maine State Planning Office, Critical Areas Program, Augusta, Maine.