(Portland, OR) -- The fall return of Vaux's swifts has Portlanders wondering where the birds will roost after abandoning Chapman Elementary's chimney last year. For decades, thousands gathered there, with counts peaking at more than 11,000 in 2023. But in 2024, only about 1,000 swifts appeared at Chapman, while flocks shifted to the Holy Trinity Greek Orthodox Cathedral and other chimneys across the city. Bird Alliance of Oregon says the swifts' habits can change suddenly, making this year's Swift Watch unpredictable. Residents are encouraged to report sightings to help track the birds' movements.