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The Ontario Great Gray Owl Irruption of 2004-2005: Numbers, Dates and Distribution
Colin D. Jones

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The Ontario Great Gray Owl Irruption of 2004-2005: Mortality, Sex, Molt and Age
Mark K. Peck and Glenn B. Murphy

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Ageing and Variation of Great Gray Owls
Ron Pittaway and Jean Iron

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Photo Quiz
Glenn Coady

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Notes
Al Sandilands and Bob Curry