Big trees are big players in bird habitat. They offer structure, shade, and shelter—but their real power is in what they offer through the seasons. Insects, acorns, and nesting/roosting cavities.

The species highlighted below are some of Minnesota’s most valuable native keystone trees, supporting hundreds of caterpillar species while also providing nesting cavities, shelter, seeds, and seasonal food resources.

Each card highlights the habitat resources these keystone trees provide throughout the year. Use the key below to explore the ecological value of each species.