Territory size, site fidelity, apparent death of partner, and mate fidelity of songbirds spot-mapped in forested landscapes surrounding Seattle, WA, USA, from 2003–2010.

<p>Assessment of site fidelity was done within each landscape and summed here for an overall proportion because territory size varied among species and among landscapes (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0167829#pone.0167829.s002" target="_blank">S1 Table</a>). When a banded bird remated with a new partner and it’s mate from the prior year was not detected in the study area, we concluded the prior mate was apparently dead. Species abbreviated as follows, Bewick’s wren: BEWR; dark-eyed junco: DEJU; song sparrow: SOSP; spotted towhee: SPTO; Swainson’s thrush: SWTH; Pacific wren: PAWR.