My research program broadly focuses on the evolution, population genetics, and ecology of (mostly) birds. Although I was trained as an ecologist, I currently use genetic methods (e.g., next-generation sequencing and bioinformatics) derived from both field-based sampling and museum specimens. I started studying birds as an undergraduate and it remains the focus of my research when possible. In recent years, however, my penchant for collaborating has lead me into areas of research I would have never previously considered (i.e., plants, microalgae, clams).


Sweet, A.D., J.D. Maddox, and K.P. Johnson. 2017. A complete molecular phylogeny of Claravis confirms its paraphyly within small New World ground-doves (Aves: Peristerinae) and implies multiple plumage state transitions. Journal of Avian Biology: In press.

Tarwater, C.E., J.D. Brawn, and J.D. Maddox. 2013. Low extra-pair paternity observed in a tropical bird despite ample opportunities for extra-pair mating. Auk 130:733-741.

Maddox, J.D., and P.J. Weatherhead. 2012. Discrepancy between factors affecting nestling growth and survival and maternal success in Common Grackles. Journal of Field Ornithology 83:17-25.

Tarwater, C.E., R.E. Ricklefs, J.D. Maddox, and J.D. Brawn. 2011. Pre-reproductive survival in a tropical bird and its implications for avian life histories. Ecology 92:1271–1281.

Maddox, J.D., and P.J. Weatherhead. 2009. Seasonal sex allocation by Common Grackles? Revisiting a foundational study. Ecology 90:3190-3196.

Maddox, J.D., R.M. Bowden, and P.J. Weatherhead. 2008. Yolk testosterone and estradiol variation relative to clutch size, laying order and hatching asynchrony in common grackles. Journal of Ornithology 149:643-649.

Maddox, J.D., and P.J. Weatherhead. 2008. Egg size variation in birds with asynchronous hatching: is bigger really better? American Naturalist 171:358-365.

Maddox, J.D., and P.J. Weatherhead. 2006. Nests without eggs: abandonment or cryptic predation? Auk 123: 135-140.