Brownlee, W.C.2010-02-152010-02-151977http://hdl.handle.net/1969.3/19967n.p.The Attwater's prairie chicken spring population census, utilizing two airplanes, a helicopter, and ground counts was completed March 25, 1976. The total Attwater's prairie chicken population was estimated to be 2,088 birds, a decrease of 6.8 percent from the 1975 census.birdsattwaters prairie chickenabundanceaerial surveyspopulation dynamicscensusBook