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At each scent station, we placed a scent lure (2011: fatty acid scented disc [Pocatello Supply Depot, Pocatello, Idaho, USA]; 2012: liquid scent [Murray’s Lures, Walker, West Virginia, USA]) on the ground and an infrared-triggered camera (PC 900, Reconyx©, Holmen, Wisconsin) approximately two meters from the scent either directly north or south to avoid false camera triggers by the sun.
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