Natural variation in circulating testosterone does not predict nestling provisioning rates in the northern cardinal, Cardinalis cardinalis

The "Challenge Hypothesis": Theoretical Implications for Patterns of Testosterone Secretion, Mating Systems, and Breeding Strategies

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Hormones and animal social behavior

Choice Reviews Online · 2006 · 744 citations

Hybrid Zone, Reproductive Biology, Social Sciences +16

Testosterone and Aggression in Birds

John C. Wingfield, Gregory F. Ball, Alfred M. Dufty et al. · American Scientist · 1987 · 499 citations

Biology, Animal Behaviour, Breeding Behavior +15

Testosterone and Avian Life Histories: Effects of Experimentally Elevated Testosterone on Behavior and Correlates of Fitness in the Dark-Eyed Junco (Junco hyemalis)

Ellen D. Ketterson, Val Nolan, Licia Wolf et al. · The American Naturalist · 1992 · 424 citations

Breeding Behavior, Testosterone Treatment, Fitness +22

Effects of Experimental Manipulation of Testosterone Levels on Parental Investment and Breeding Success in Male House Sparrows

Robert E. Hegner, John C. Wingfield · The Auk · 1987 · 347 citations

Breeding Behavior, Parental Care, Fertility +19