For decades, Portlanders have been accustomed to the yearly sight of Vaux's swifts swirling above the chimney at Chapman Elementary School, a punctuation on summer's end. But after a shakeup in the migratory birds' habits last year, the city waits to see where they'll land now. Joe Liebezeit with the Bird Alliance of Oregon was a guest on this week's episode of Straight Talk to discuss why the migratory birds might be moving away from their traditional fall resting place.