Beginning in 2003, we sampled adult forms of Ephemeroptera, Plecoptera, and Trichoptera in American Fork Canyon, Utah, supplemented by first 100 kicks and surber sampling of nymphs. From May to October 2007, we performed field work focusing on  Pictetiella expansa. To test for substrate electivity, surber samples were taken across the stream width.  Abiotic data including water depth, approximate flow, and substrate ratios of each microhabitat were taken. The highest abundances of nymphs were on medium to large rock substrates, habitats conducive to the predatory behaviors of perlodids. The femur length, interocular distance, and other morphological features were measured to calculate growth rates and determine instar number.  We predict that community structure, especially the presence of Megarcys signata, may depress the growth rate of P. expansa influencing the unusual late fall emergence. Adult emergence extended from late August to early September for approximately two weeks, which is relatively short for perlodids. Current data show this species is univoltine. We were not yet able to assess diapause strategies. Gut content analysis is currently being performed to assess the diet of P. expansa and how it is influenced by the presence of similar predators like M. signata and Isoperla spp.