“Black-Crowned Night-Herons of the Lake Calumet Region,Chicago, Illinois: Nesting Ecology of Black-Crowned Night-Herons at Lake Calumet Wetlands”. Illinois Natural History Survey Bulletin, vol. 37, no. 1-6, Aug. 2005, pp. 95-108, https://doi.org/10.21900/j.inhs.v37.113.