Grass spider microhabitat use in Organ Pipe Cactus National Monument, Arizona

The grass spider ( Agelena naevia ), commonly found in Organ Pipe Cactus National Monument, Arizona, uses rodent burrows located under a shrub canopy more frequently for web construction than burrows located in the open. The average number of prey available in canopy microhabitat was greater than in open microhabitat, and unequal prey abundance may explain spider microhabitat use.