Researchers raise red flag after documenting dramatic shift in birds' behavior: 'How long can these birds continue to exist?'

Researchers raise red flag after documenting dramatic shift in birds' behavior: 'How long can these birds continue to exist?'

A new study on the shifting migratory patterns of a small gray Canadian bird has researchers worried about the species' survival. What's happening? The study, conducted by the University of Alberta and published in The Wilson Journal of Ornithology, showed that the fall migration for the least flycatcher moved earlier by an average of 14 days over the past 32 years. Adult birds migrated 13 days ahead of younger birds, and adult females five days…