BirdAnalyst
Family · Vireonidae · Passeriformes

Vireos Population Trends

13 species tracked, ordered by long-term trend. Steepest declines first.

Vireos species ranked by population trend.
TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →History
Black-whiskered VireoForest birds-88%1968
Philadelphia VireoForest birds-51%1969
Red-eyed VireoForest birds+34%1968
White-eyed VireoForest birds+48%1968
Yellow-throated VireoForest birds+62%1968
Bell's VireoForest birds+130%1968
Warbling VireoForest birds+187%1968
Hutton's VireoForest birds+210%1970
Cassin's VireoForest birds+219%1970
Blue-headed VireoForest birds+335%1968
Gray VireoForest birds+397%1970
Plumbeous VireoForest birds+486%1969
Black-capped VireoForest birds19×1973