Pitfall Traps (IMAGE) Washington University in St. Louis Caption Pitfall traps are a common way to sample arthropods; these yellow traps have been used at Zackenberg to build the largest and longest-standing arthropod monitoring program in the Arctic. Credit Toke Høye Usage Restrictions For editorial purposes License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.