Seasonal summaries

How to use

Use seasonal summaries to explore past migration seasons. Explore when and where birds moved, compare migration traffic among states and counties, and browse through nightly summaries movement intensity in the continental U.S. Currently available for spring 2026.

Scroll through the left panel to explore each section. As you move down the sidebar, the visualization on the right updates automatically. Use the controls to switch views and explore nightly migration patterns.