Maredia, K. M., S. H. Gage, D. L. Landis, and T. M. Wirth. 1992. Ecological observations on predatory Coccinellidae Coleoptera in southwestern Michigan. Great Lakes Entomologist 25: 265-270.
Ecological observations on habitat utilization by thirteen species of predatory Coccinellidae were made at a southern Michigan site during 1989 and 1990. Most of species were common during both years and used both agricultural and uncultivated habitats. Coccinella septempunctata and Coleomegilla maculata, were the most abundant in agricultural crops (alfalfa, maize, soybean and triticale), whereas Adalia bipunctata and Cycloneda munda, were the most abundant in deciduous and bushy habitats.