TY - RPRT TI - Site fidelity, territory fidelity, and natal philopatry in Willow Flycatchers ( Empidonax traillii ) AU - James A. Sedgwick PY - 2004 DO - 10.1642/0004-8038(2004)121[1103:sftfan]2.0.co;2 UR - https://pubs.usgs.gov/publication/1015226 ID - 1015226 ER -