The consistent presence of paired ovaries in the Kiwi(Apteryx) with some discussion of this condition in other birds

The Avian Egg

Gustav A. Swanson, Alexis L. Romanoff, Anastasia J. Romanoff · Journal of Wildlife Management · 1949 · 1.1K citations

Sexual Dimorphism and Food Habits in Three North American Accipiters

Robert W. Storer · The Auk · 1966 · 305 citations · Full text

Life Sciences, Animal Sciences, Zoology +9

New Zealand Birds

Thane Riney, William R. Oliver · Bird-Banding · 1956 · 277 citations

A New Dictionary of Birds

David W. Johnston, Alexander Thomson · Bird-Banding · 1965 · 222 citations

Life Sciences, Animal Sciences, Zoology +11

Fundamentals of Ornithology

J. C. Dickinson, Josselyn Van Tyne, Andrew J. Berber · AIBS Bulletin · 1960 · 168 citations