The amphibian chytrid fungus appears to grow best between 17 and 25 °C, and exposure of infected frogs to high temperatures can cure the frogs. In nature, the more time individual frogs were found at temperatures above 25 °C, the less likely they were to be infected by the amphibian chytrid. This may explain why chytridiomycosis-induced amphibian declines have occurred primarily at higher elevations and during cooler months. Naturally produced cutaneous peptides can inhibit the growth of "B. dendrobatidis" when the infected amphibians are around temperatures near 10 °C (50 °F), allowing species like the northern leopard frog ("Rana pipiens") to clear the infection in about 15% of cases.