Journal of Avian Biology 48: 1483–1504, 2017 doi: 10.1111/jav.01248 © 2017 The Authors. Journal of Avian Biology © 2017 Nordic Society Oikos Subject Editor: Catherine Graham. Editor-in-Chief: Jan-Åke Nilsson. Accepted 15 October 2017 Avian SDMs: current state, challenges, and opportunities Jan O. Engler*, Darius Stiels*, Kathrin Schidelko, Diederik Strubbe, Petra Quillfeldt and Mattia Brambilla J. O. Engler (http://orcid.org/0000-0001-7092-1380) (
[email protected]) and D. Strubbe, Terrestrial Ecology Unit, Dept of Biology, Ghent Univ., Ghent, Belgium. JOE also at: Dept Wildlife Sciences, Univ. of Göttingen, Göttingen, Germany. DS also at: Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, Univ. of Copenhagen, Copenhagen, Denmark, and Evolutionary Ecology Group, Dept of Biology, Univ. of Antwerp, Antwerp, Belgium. – D. Stiels, K. Schidelko and JOE, Zoological Research Museum Alexander Koenig, Bonn, Germany. – P. Quillfeldt, Dept of Animal Ecology and Systematics, Justus-Liebig-Univ., Giessen, Germany. – M. Brambilla, Museo delle Scienze, Sezione Zoologia dei Vertebrati, Trento, Italy, and Fondazione Lombardia per l’Ambiente, Settore Biodiversità e Aree protette, Seveso, MB, Italy. Quantifying species distributions using species distribution models (SDMs) has emerged as a central method in modern biogeography. These empirical models link species occurrence data with spatial environmental information. Since their emergence in the 1990s, thousands of scientific papers have used SDMs to study organisms across the entire tree of life, with birds commanding considerable attention. Here, we review the current state of avian SDMs and point to challenges and future opportunities for specific applications, ranging from conservation biology, invasive species and predicting sea- bird distributions, to more general topics such as modeling avian diversity, niche evolution and seasonal distributions at a biogeographic scale.