Recommended Citation

Winkler, D. W., S. M. Billerman, and I.J. Lovette (2020). Old World Sparrows (Passeridae), version 1.0. In Birds of the World (S. M. Billerman, B. K. Keeney, P. G. Rodewald, and T. S. Schulenberg, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.passer4.01