Kelly, J. F., Shipley, J. R., Chilson, P. B., Howard, K. W., Frick, W. F., & Kunz, T. H. (2012). Quantifying animal phenology in the aerosphere at a continental scale using NEXRAD weather radars. Ecosphere, 3(2), 1-9. doi:10.1890/es11-00257.1.