Survey Procedures: Drift Fences

Drift fences capture amphibians and reptiles by taking advantage of seasonal movements such as migrations to or from overwintering sites. A drift fence consists of a barrier (i.e. 50-foot length of aluminum flashing or window screening) that is embedded in the ground to guide animals into adjacent funnels or pit-fall traps. These traps also capture small mammals and invertebrates.

funnel trap.

Common Gartersnakes (Thamnophis sirtalis) captured in drift fence funnel trap. Photo by C. D. Hall.

Drift fence.

Forest-dwelling salamanders are targeted with drift fences. Photo by C. D. Hall.