Zimmer, K. and M.L. Isler (2020). Willis's Antbird (Cercomacroides laeta), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.wilant1.01 retrieved June 29, 2024