scholarly journals 52nd Annual Saskatchewan Christmas Bird Count – 1993

Blue Jay ◽  
1994 ◽  
Vol 52 (1) ◽  
Author(s):  
Wayne C. Harris ◽  
Sheila M. Lamont
Keyword(s):  
Christmas Bird Count

Twenty-Third Annual Saskatchewan Christmas Bird Count, 1964

Blue Jay ◽  
1965 ◽  
Vol 23 (1) ◽  
Author(s):  
Mary Houston
Keyword(s):  
Christmas Bird Count

scholarly journals Fort Smith, N.W.T. Christmas Bird Count

Blue Jay ◽  
1970 ◽  
Vol 33 (1) ◽  
Author(s):  
Ernie Kuyt
Keyword(s):  
Christmas Bird Count ◽  
Fort Smith

scholarly journals 35th Annual Saskatchewan Christmas Bird Count-1976

Blue Jay ◽  
1970 ◽  
Vol 35 (1) ◽  
Author(s):  
Mary J. Houston
Keyword(s):  
Christmas Bird Count

Effects of ENSO and PDO Events on Seabird Populations as Revealed by Christmas Bird Count Data

Waterbirds ◽  
2000 ◽  
Vol 23 (3) ◽  
pp. 416 ◽  
Author(s):  
Robert Vandenbosch
Keyword(s):  
Count Data ◽  
Christmas Bird Count

Distribution and population fluctuations of wintering Snowy Owls (Nyctea scandiaca) in North America

1985 ◽  
Vol 63 (8) ◽  
pp. 1829-1834 ◽  
Author(s):  
P. Kerlinger ◽  
M. Ross Lein ◽  
Brian J. Sevick
Keyword(s):  
North America ◽  
Great Plains ◽  
East Coast ◽  
Northern Great Plains ◽  
Population Fluctuations ◽  
Winter Range ◽  
Christmas Bird Count ◽  
Continental Population ◽  
America South ◽  
Time Series Analyses

Christmas Bird Count data from 1952 to 1981 were used to examine the geographic distribution and population fluctuations of wintering Snowy Owls (Nyctea scandiaca) in North America south of the breeding range. Wintering owls were most abundant and regular in occurrence in the northern Great Plains and Midwest regions of North America. To the south of these locales, and on both east and west coasts, owl abundance averaged 10–100 times lower and varied dramatically from year to year. Numbers of Snowy Owls fluctuated synchronously within the east coast area, the west coast area, and possibly the Great Plains, but fluctuations were not synchronous among these three areas. Time-series analyses did not support the hypothesis of cyclic winter invasions. Earlier studies from eastern North America included only a small portion of the continental population of Snowy Owls and, consequently, their conclusions may have been biased. Our findings strongly suggest that Snowy Owls may not be cyclic invaders, but rather are regular migrants over much of their winter range.

scholarly journals Summary of the 11th Annual Saskatchewan Christmas Bird Count-1952

Blue Jay ◽  
1953 ◽  
Vol 11 (1) ◽  
Author(s):  
Saskatchewan Natural History Society
Keyword(s):  
Christmas Bird Count

scholarly journals 36th Annual Saskatchewan Christmas Bird Count - 1977

Blue Jay ◽  
1978 ◽  
Vol 36 (1) ◽  
Author(s):  
Mary I. Houston
Keyword(s):  
Christmas Bird Count

scholarly journals Christmas Bird Count Correction

Blue Jay ◽  
1987 ◽  
Vol 45 (2) ◽  
Author(s):  
Saskatchewan Natural History Society
Keyword(s):  
Christmas Bird Count

scholarly journals 40th Annual Saskatchewan Christmas Bird Count – 1981

Blue Jay ◽  
1982 ◽  
Vol 40 (1) ◽  
Author(s):  
M. Belcher
Keyword(s):  
Christmas Bird Count
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