BirdAnalyst
Family · Hirundinidae · Passeriformes

Swallows & Martins Population Trends

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

Swallows & Martins 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
Bank SwallowAerial insectivores-73%1968
Purple MartinAerial insectivores-42%1968
Barn SwallowAerial insectivores-25%1968
Tree SwallowAerial insectivores+4%1968
Northern Rough-winged SwallowAerial insectivores+54%1968
Violet-green SwallowAerial insectivores+227%1969
Cliff SwallowAerial insectivores+241%1968
Cave SwallowAerial insectivores+492%1980