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Last updated on April 24, 2014 at 21:24 EDT

Latest Kevin Fraser Stories

Songbirds Risk Missing Peak Food Supply Says Study
2013-06-03 13:45:42

York University A mismatch between the departure schedules of songbirds and higher spring temperatures at their breeding sites is putting them at risk, according to a new study out of York University. The study, "A Trans-Hemispheric Migratory Songbird Does Not Advance Spring Schedules or Increase Migration Rate in Response to Record-Setting Temperatures at Breeding Sites", published in the journal PLOS ONE, tracked the spring migration of purple martins over five years from the Amazon...

Migrating Songbirds Depart On Time
2012-07-26 07:10:41

A new study by York University researchers finds that songbirds follow a strict annual schedule when migrating to their breeding grounds — with some birds departing on precisely the same date each year. The study, published in the journal PLoS ONE, is the first to track the migration routes and timing of individual songbirds over multiple years. Researchers outfitted wood thrushes with tiny geolocator "backpacks," recording data on their movements. Spring departure dates of birds...