The Mazama Newt likely inhabited the entire lake shoreline since they colonized the lake as early as 6,000 years ago.
- The figure below shows that the Mazama Newt only occupies 50% of the habitat with crayfish inhabiting the other 50%.
- There are very few sites with both crayfish and newts.
- Crayfish were introduced to the lake by humans in 1914 for fish food.
- Studies with newts and crayfish in tanks show that crayfish will kill newts and/or force then to flee to other areas.