na INLIS000000000001177 Ind 0010-1118001177 Nesting biology of Mallards in West-Central Illinois ILLINOIS NATURAL HISTORY SURVEY Aaron P. Yetter... [et al..] Illinois Illinois Natural History Survey 2009 38 p., ills.; 26 cm.-- 38 p., ills.; 26 cm.-- ISBN978-88293-22-1 Sr.598.412 Bibl.: p. 28-37. 598.412 DUCKS NESTING BREEDING METHODS BIOLOGY ANIMAL MORPHOLOGY 38/MS/2013-mfn2013 38/MS/2013-mfn52325