Natal and Adult Dispersal of Red-eyed Vireos in a Large Southern Ontario Forest

Abstract We report re-encounter rates and dispersal distances of Red-eyed Vireos (Vireo olivaceus) re-encountered 1 year after banding in a large forest (∼ 4,600 ha) in southern Ontario, Canada. We re-encountered 12 (11%) of 109 banded individuals. Dispersal distances ranged from 40 to 9,870 m and were longest for hatch year (HY) bandings (median  =  4,970 m, n  =  3). Distances were similar between other age classes (SY: median  =  225 m, n  =  4; ASY: median  =  220 m, n  =  5), and males (median  =  220 m, n  =  9) and females (median  =  250 m, n  =  3). Our re-encounters of banded Red-eyed Vireos provide information on dispersal, detection rates, and methodology that could potentially improve future marking efforts and apparent survivorship estimates.