BirdAnalyst
Family · Sylviidae · Passeriformes

Sylviid Warblers Population Trends

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

Sylviid Warblers 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
WrentitForest birds-4%1970