Restoring wetlands involves repairing the hydrology on a site where a wetland was historically present. Most wetlands in the farming landscape have been drained and filled. The ecological restoration of these sites involves removing the fill and drainage pipes using excavators, which allows water to flood in once again. After a site has filled with water, wetland vegetation is planted including waterlilies, wetland wildflowers and many sedge species. Restored wetlands are quick to attract migrating water birds such as greater & lesser scaup, ringneck ducks, mallards, and American bitterns. During the summer months, common breeding birds in wetlands installed by Natvik design include American coot, sora rail, least bittern, green heron, and wood ducks.