| Table 2. Distribution of rarity among four groups of conservative prairie and savanna-requiring insects within the Chicago Wilderness Region. | |||||
| Species groups | RARITY CLASSES | ||||
common ← → rare |
|||||
| n = 400 | 1 | 2 | 3 | 4 | 5 |
| Number of species in each rarity class | |||||
| Homoptera | 12 | 4 | 27 | 26 | 53 |
| butterflies | 2 | 3 | 11 | 8 | 18 |
| moths | 9 | 10 | 44 | 53 | 92 |
| other spp. | 1 | 2 | 10 | 4 | 11 |
| Kendall's coefficient of concordance W = 0.93 ; P < 0.01 | |||||