Three contrasting sites in a partially wooded, temporarily flooded lowland in central Michigan were sampled for eggs of Aedes mosquitoes to determine which sites were the most attractive for oviposition. A difference in species composition was observed at the site with a significantly (P<0.05) lower mean percent soil moisture in the spring and fall. The greatest density of eggs (4560/0.56m2, primarily Ae. vexans (Meigen) was found on soil that maintained the highest mean percent soil moisture in the spring (52.9%) and fall (52.0%). The soil was a silt loam with a dense stand of canary grass (Phalaris arundinacea L.).