BirdAnalyst
Family · Polioptilidae · Passeriformes

Gnatcatchers Population Trends

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

Gnatcatchers 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-tailed GnatcatcherArid-land birds-28%1969
California GnatcatcherForest birds-15%1974
Blue-gray GnatcatcherForest birds+150%1968