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Manitoba's Slithering Spectacle: 75,000 Snakes Emerge!
7 May
Summary
- Thousands of red-sided garter snakes emerge from limestone dens annually.
- Underground limestone caves provide a warm refuge during winter.
- Conservation efforts have created tunnels to protect snakes from traffic.

Each spring, Manitoba witnesses a remarkable natural phenomenon as tens of thousands of red-sided garter snakes emerge from underground limestone dens near Narcisse. Experts estimate populations can range from 75,000 to 150,000, creating one of the world's largest natural snake gatherings.
These snakes survive frigid prairie winters by hibernating in a network of limestone caves and sinkholes. These subterranean spaces remain warmer than the surface, acting as natural shelters. Upon the arrival of spring, the snakes emerge, often engaging in complex mating rituals, including dramatic "mating balls."
Historically, a significant threat to the snake population was road mortality on Highway 17. Thousands of snakes perished annually during their seasonal movements. However, successful conservation initiatives, featuring underpasses and guiding fences, have dramatically reduced these losses.
The Narcisse Snake Dens continue to be a focal point for researchers studying snake behavior and survival strategies in extreme environments. This annual emergence remains a powerful demonstration of nature's resilience and cyclical patterns.