• American Ornithologists' Union (Life Fellow), 1963-
• Association of Field Ornithologists, 1991-1997
• British Ornithologists' Union, 1970-1993
• Cooper Ornithological Society (Life Member), 1965-
• Florida Ornithological Society (Charter Member), 1972-
• Linnaean Society of New York, 1967-2000
• Urner Ornithological Club, 1963-2000
• Wilson Ornithological Society, 1963-

Editorships   Top

• Editor, Biennial Reports 1991-1992, 1993-1994, 1995-1996, 1997-1998, 1999-2000, Archbold Biological Station
• Editor (with Reuven Yosef), Proceedings First, Second, Third, & Fourth nternational Shrike Conferences, 1993, 1996, 2000, 2004
• Editor (with Reuven Yosef), Bibliography of shrikes of the world, 1993-1996, 1997-
• Editor, Newsletter, Archbold Biological Station. No. 1-12, 1986-1994
• Special Editor for Periodical Literature, Florida Field Naturalist, 1985-1991, compiler of Periodical Literature Section, Florida Field Naturalist, 1976-1984
• Associate Editor, The Auk, in charge of Recent Ornithological Literature (a supplement to The Auk) 1983-1990
• Associate Editor for reviews, Florida Field Naturalist, 1981-1985
• Editor, Florida Field Naturalist, 1976-1981
• Editor, Florida Ornithological Society, Special Publication No. 1, 1978
• Editorial Assistant for the Periodical Literature Section, The Auk, 1968-1971
• Editor, Urner Field Observer, 1966-1967

Professional Activities in Science

American Ornithologists' Union--(Life Fellow)   Top

• Member, historical records committee, 2007-
• Interim Director, Ornithological Societies of North America, 2000
• Director, Ornithological Societies of North America (a joint membership service), 1991-1998
• Member, finance committee, 1991-1998
• Member, subcommittee for special exhibits, local committee for American Ornithologists' Union Centennial meeting, September, 1983
• Abstractor, Recent Literature section of The Auk, 1968-1971, 1973-1991
• Member, membership committee, 1979-1983.

Florida Ornithological Society--(Charter Member)   Top

• Member, local committee, fall meeting, 26-28 October 2007, Sebring
• Member, finance committee, 2003-
• Member, records committee, 2001-2007
• Chairman (1987-1992), member (1993-1998), editorial advisory board
• Chairman, local committee, spring meeting, 12-14 April 1996, Haines City
• President, 1993-1995
• Member, local committee, fall meeting, 29-31 October 1993, Archbold Biological Station
• Member, board of directors, 1976-1981, 1983-1985, 1989-1991, 1993-1995, 1995-1997, 1999-2003
• Member, executive committee, 1976-1981, 1983-1985, 1993-1995
• Member, research awards committee, 1990-1991
• Member, membership committee, 1981-1987
• Assistant to the Treasurer, 1981-1987
• Chairman (1973), member (1985-1987), nominating committee
• Vice-President, 1983-1985
• Chairman, local committee, spring meeting, 22-24 April 1977, Lake Placid

• Review manuscripts for Ibis, Journal of Field Ornithology, Ostrich, 2002-2003
• Webmaster, "Welcome to Archbold Biological Station." <http://www.archbold-station.org> 1997-2005
• Member, Lake Wales Ridge Ecosystem Working Group, 1992-2005
• Member, program committee, Third International Shrike Symposium, Gdansk, Poland, 15-18 September 1999
• Participator, annual USFWS Breeding Bird Survey, 1976-1998
• Member, local committee, 1998 annual meeting, Colonial Waterbird Society
• Member, Highlands County Natural Resources Advisory Commission, 1991-1996
• Member, nominating committee, Cooper Ornithological Society, 1995, 1996
• Member, student poster paper award committee, Colonial Waterbird Society, 1995
• Member, audit committee, Wilson Ornithological Society, 1995
• Member, committee on birds, Florida Committee on Rare and Endangered Biota, 1985-1995
• Compiler, Lake Placid Christmas Bird Count, 1988-1993
• Member, local committee, International Shrike Symposium, January 1993
• Member, nominating committee, Wilson Ornithological Society, 1992-1993
• Member, local committee, Wilson Ornithological Society/Florida Ornithological Society joint meeting, 9-12 April 1992, Kissimmee
• Member, advisory board, Florida Breeding Bird Atlas Project, 1985-1992
• Area Editor, Florida region report, American Birds, 1981-1992
• Treasurer, Environmental Council of Highlands County, 1977-1981
• Member, local committee, American Society of Zoologists, et al., 1979 Annual Meeting, 27-30 December 1979, Tampa
• Reviewer for General Notes section, Wilson Bulletin, 1974-1978
• Secretary, Environmental Council of Highlands County, 1972-1977
• Member, local committee, 52nd Annual Meeting, American Society of Mammalogists, 18-22 June 1972, Tampa