The genus Choristoneura comprises some of the most injurious forestry and agriculture pests including spruce budworm (C. fumiferana) and obliquebanded leafroller (C. rosaceana). A demonstration of an interactive key created with the software program Lucid shows how these types of programs can facilitate quicker, more accurate identifications than traditional dichotomous keys (in this case for the ichneumonid parasitoids of Choristoneura). These keys can be distributed over the web or on CD-ROM to a broad range of researchers.