In our heron studies we have made much use of aerial reconnaissance to locate nesting colonies, estimate population density and study migrations and dispersals.
Author: Julian L. Dusi and Rosemary T. Dusi
Volume Number: 16 Year Published: 1968
Issue Number: 2-3
Page Number: 14
Link to article: http://birdlife.aosbirds.org/1968/Vol 16 No. 2, 3_1968_p14-16.pdf
Link to the full issue of BirdLife: http://birdlife.aosbirds.org/1968/Vol 16 No. 2, 3_1968.pdf
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