Small mammals generally require 20-30 feet of buffer, while amphibians can require anywhere from 10 feet to 300 feet. In particular, many butterflies and moths use certain native tree species as host plants. You may be trying to access this site from a secured browser on the server. Riparian buffer areas are capable of retaining more than 300,000 pounds of sediment per acre per year. The DCNR recently announced a new stream buffer program, urging 10,000 Pennsylvania landowners who live along the state’s streams, creeks, and rivers to plant native trees near the water’s edge. The program publishes a handbook containing lists of resources that can help you in planning your buffer and places to look for money and technical advice.