| | Spring Peeper Pseudacris crucifer (Site not responding. Last check: 2007-10-22) |
 | | Distribution and Status: Spring peepers are common in the eastern part of the region. |
 | | To the south, peepers are found in the Palos region of Cook County and in adjacent Dupage County, and in a few places in eastern Will County. |
 | | Phenology: Breeding activity commences in early spring, usually a few days after the first western chorus frogs are heard, and vocalization continues into early May. Eggs are deposited singly, attached to the underside of leaf litter on the pond bottom. |
| kmier.net /ecology/peeper.html (403 words) |