Systematics and evolutionary relationships among the herons (Ardeidae)
1976
Behavior, mimetic songs and song dialects, and relationships of the parasitic indigobirds (vidua) of Africa
1973
Breeding seasons and reproductive physiology of tricolored blackbirds and redwinged blackbirds
1969
The cuckoos
2005
A distributional checklist of the birds of Michigan
1983
Nestling mouth markings and colors of Old World finches Estrildidae
2005
Sexual selection, lek and arena behavior, and sexual size dimorphism in birds
1984
Species limits in the indigobirds (Ploceidae, Vidua) of West Africa
1982
Let there be light
2010
The Cuckoos: Cuculidae (Bird Families of the World Book 15)
2005
The birds of mopane woodland and other habitats of Hans Merensky Nature Reserve, Transvaal
1968
