The study also included components to test the effects of two different gypsy moth control agents on non-target moths. Nearly one thousand moth species have been identified from this study. Long-term quantitative data on all butterfly species are needed to evaluate these possible declines. Killing butterflies for identification is quickly becoming a practice of the past. Computerized data from twenty butterfly-monitoring sites are being analyzed at the Museum.
Invertebrates are well represented in The Diversity of Life exhibit on the ground level.
In the classroom level hallway, Old-field Insects, Pond Insects, Woodland Insects, Household Pests and Insects of Public Health Importance and Insects of Vegetables, Fruit and Ornamental Plants are important displays on the ecology of insects and how they affect humans. A World of Beetles shows the diversity of size, shape, and color of just one order of insect. The most important display is Butterflies and Skippers of Ohio . This collection together represents a unique historical snapshot of Ohio's lepidopteran fauna. Speyeria idalia , the regal fritillary, has been extirpated from Ohio since the early 1990's.