Castle Rock Peregrine Falcon Nest

A Historic Cliff Eyrie

The Castle Rock eyrie is a natural rock cavity set into an iconic limestone bluff along the Mississippi River. Peregrine falcons first returned here to nest in the early 2000s following cliff-release efforts, and the rugged ledge has hosted successful broods almost every year since.

The Peregrine Falcons

The camera frames the scrape where the resident pair rears its young. Viewers can watch the peregrine falcons — among the fastest animals on Earth in a hunting stoop — as they incubate, feed and defend their brood against the backdrop of bare stone.

The Mississippi River Valley

Perched high on the bluff, the eyrie surveys the Upper Mississippi River valley near Winona. The river corridor is a vital migratory flyway, and the vantage captures the sweep of water, wooded hills and open sky that define this stretch of the river.

Conservation in Action

A partnership between the Raptor Resource Project, Winona State University and explore.org, this cam turns a once-imperilled species into a living classroom, documenting the ongoing recovery of the peregrine falcon across the Upper Midwest.