Title:  An analysis of the use of helicopters as a technique for censusing deer.
Author(s): Wade, L. D. and C. A. DeYoung.
Year: 1980
Abstract: Helicopters are widely used to census deer on ranch-sized units in South Texas. The assumption has been made by many that this technique is the most accurate available. However, very little objective evaluation of the accuracy and precision of the technique has been done. Two series of six counts each were made using a helicopter on the Zachry Blanco Ranch near Laredo, Texas. The study pastures contained 31 individually marked deer and were surrounded by a deer-proof fence. The ratio of marked to unmarked deer observed on each flight was used to calculate a population estimate. Results showing accuracy of the technique under various conditions are described.

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Human dimensions in deer damage control. (1983)

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