Hummingbird Migration 2024 In Iowa. Bird migration forecast maps show predicted nocturnal migration 3 hours after local sunset and are updated every 6 hours. The exact timing of their arrival may vary slightly depending on weather conditions and individual migration routes.
Hummingbirds leave iowa at the end of summer and begin their migration south to warmer regions in mexico and central america. The rufous hummingbird embarks on one of the longest migratory journeys of any hummingbird, spanning nearly 4,000 miles from mexico to alaska.