Abstract
THIS paper describes the use of natural features as reference points to territorial boundaries by cock Prairie Chickens (Tympanuchus cupido pinnatus) and the birds' response to experimental creation and movement of mowed edges on booming gro-unds. Hamerstrom and Hamerstrom (1960) suggest that such natural features as wheel tracks, dead furrows, tussocks, and droppings may serve as reference points to Prairie Chicken territorial boundaries. I found similar features in apparent use for the same purposes on 23 booming grounds in Grant, Linwood, Carson, and Plover Townships, Portage County; and in Sherry and Sigel Townships, Wood County, Wisconsin during 1962, 1963, and 1964. Also cocks relocated territories in response to uncontrolled midseason changes in surface features. Experimental changes in booming ground cover were implemented by mowing to study cock responses in greater detail.
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