Of detectability and camouflage: evaluating Pollard Walk rules using a common, cryptic butterfly

• Published in: Ecosphere
• Main Authors: Federico Riva, Giorgio Gentile, Simona Bonelli, John H. Acorn, Francisco V. Denes, Andrew D. Crosby, Scott E. Nielsen
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2020
• Subjects: Arctic; Canada; Pollard
• Online Access: https://www.openaccessrepository.it/record/30890; https://doi.org/10.1002/ecs2.3101

Abstract Estimating distribution and abundance of species depends on the probability at which individuals are detected. Butterflies are of conservation interest worldwide, but data collected with Pollard walks—the standard for national monitoring schemes—are often analyzed assuming that changes in d...