Birdwatchers delighted as warblers pass through Calgary for fall migration, but birds face challenges in city

Birdwatchers delighted as warblers pass through Calgary for fall migration, but birds face challenges in city

Warblers and other perching birds are heading down south for their annual fall migration, and for many small songbirds, Calgary is a crucial stopping point. It's something local birdwatchers look forward to every year, but migrating through Calgary can come with significant challenges for birds.