In Portland, thousands gather to marvel at migrating birds' nighttime routine
Briefly

Vaux's Swifts are known for their remarkable migration from the Pacific Northwest to Central and South America and their spectacular evening roosting behavior.
These sleek birds eat, drink, mate, and travel in the air without perching, relying on their unique muscle structure and aerodynamic wings.
During migration, Vaux's Swifts gather in large flocks to roost in chimneys, showcasing their adaptation for life on the wing.
Their special toe structure and tail barbs help them cling to the rough interiors of chimneys, demonstrating a unique evolutionary adaptation.
Read at www.npr.org
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