1. Communal Courtship in the Ruffed Grouse, Bonasa umbellus L;Adams;Auk,1960
2. Sex Rhythm in the Ruffed Grouse (Bonasa umbellus Linn.) and Other Birds;Allen;Auk,1934
3. Allen, R. P., and F. P. Mangels 1940 Studies of the Nesting of the Black-crowned Night Heron. Proc. Linnaean Soc. New York, Nos. 50–51: 1–28. (Detailed observations on mating and display.)
4. The Displays Given by Passerines in Courtship and Reproductive Fighting: A Review;Andrew;Ibis,1961
5. Bird Display and Behaviour: An Introduction to the Study of Bird Psychology;Armstrong,1947