Factors affecting the distribution and abundance of autumn vagrant New World warblers in northwestern California and southern Oregon

by C. John Ralph, Jared D. Wolfe
Published 2018-12-01

Do birds select habitat or food resources? Nearctic-neotropic migrants in northeastern Costa Rica.

by Jared D Wolfe, Matthew D Johnson, C John Ralph
Published 2014-01-01

Bird Communities and Environmental Correlates in Southern Oregon and Northern California, USA.

by Jaime L Stephens, Eric C Dinger, John D Alexander, Sean R Mohren, C John Ralph, Daniel A Sarr
Published 2016-01-01