A study by University of Guelph researchers on how winter affects how many birds will breed each year was featured by CTV News March 21. The researchers found the  temperature at sparrows’ winter home plays a major role in determining how many of the birds return to Canada to breed in the spring and summer. Integrative biology professor Ryan Norris said the study could aid in conservation efforts for songbirds and other migratory animals.

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  3. Winter Sets Up Bird Breeding Success: Study
  4. Tiny Songbird Makes Record Migration, U of G Study Proves