-
By: Butler, Robert W. (Robert William),
Type: Article
In: The Canadian field-naturalist
Volume: 94
Series:
Issue: 2
Date: 1980
Page Range: 197--197
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
-
By: Butler, Robert W. (Robert William), - Verbeek, Nicolaas A. M. - Richardson, Howard
Type: Article
In: The Wilson bulletin
Volume: 96
Series:
Issue: 3
Date: 1984
Page Range: 408--418
Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
Subjects:
-
By: Goossen, J. Paul - Butler, Robert W. (Robert William), - Stushnoff, Brian - Stirling, David
Type: Article
In: The Canadian field-naturalist
Volume: 96
Series:
Issue: 3
Date: 1982
Page Range: 345--346
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
-
By: Butler, Robert W. (Robert William),
Type: Article
In: The Canadian field-naturalist
Volume: 88
Series:
Issue: 3
Date: 1974
Page Range: 313--316
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
-
By: Sirois, Jacques - Butler, Robert W. (Robert William),
Type: Article
In: The Canadian field-naturalist
Volume: 108
Series:
Issue: 1
Date: 1994
Page Range: 91--92
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
-
By: Butler, Robert W. (Robert William), - Kaiser, Gary W
Type: Article
In: The Wilson bulletin
Volume: 107
Series:
Issue: 3
Date: 1995
Page Range: 413--422
Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
Subjects:
-
By: Butler, Robert W. (Robert William), - Delgado, Francisco S - Cueva, Horacio de la - Pulido, Victor - Sandercock, Brett K
Type: Article
In: The Wilson bulletin
Volume: 108
Series:
Issue: 4
Date: 1996
Page Range: 662--672
Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
Subjects:
-
By: Butler, Robert W. (Robert William), - Verbeek, Nicolaas A. M. - Foottit, Robert George
Type: Article
In: The Canadian field-naturalist
Volume: 94
Series:
Issue: 3
Date: 1980
Page Range: 315--320
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
-
By: Butler, Robert W. (Robert William),
Type: Article
In: The Canadian field-naturalist
Volume: 112
Series:
Issue: 2
Date: 1998
Page Range: 346--347
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
-
By: Butler, Robert W. (Robert William), - Campbell, Carol A.
Type: Article
In: The Canadian field-naturalist
Volume: 101
Series:
Issue: 3
Date: 1997
Page Range: 433--434
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
-
By: Butler, Robert W. (Robert William),
Type: Article
In: The Canadian field-naturalist
Volume: 95
Series:
Issue: 4
Date: 1981
Page Range: 476--477
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
-
By: Butler, Robert W. (Robert William),
Type: Article
In: The Canadian field-naturalist
Volume: 96
Series:
Issue: 1
Date: 1982
Page Range: 120--121
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
-
By: Foottit, Robert George - Butler, Robert W. (Robert William),
Type: Article
In: The Canadian field-naturalist
Volume: 91
Series:
Issue: 2
Date: 1977
Page Range: 189--190
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
-
By: Sullivan, Terrance M. - Butler, Robert W. (Robert William), - Boyd, W. Sean
Type: Article
In: The Canadian field-naturalist
Volume: 116
Series:
Issue: 3
Date: 2002
Page Range: 366--370
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
-
By: Butler, Robert W. (Robert William), - Shepherd, Philippa C F - Lemon, Moira J F
Type: Article
In: The Wilson bulletin
Volume: 114
Series:
Issue: 4
Date: 2002
Page Range: 485--490
Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
Subjects:
-
By: Butler, Robert W. (Robert William),
Type: Article
In: The Canadian field-naturalist
Volume: 113
Series:
Issue: 3
Date: 1999
Page Range: 390--395
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects: