BirdAnalyst
Family · Gaviidae · Gaviiformes

Loons Population Trends

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

Loons 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
Common LoonWetland birds+44%1968
Pacific LoonWetland birds+401%1983
Red-throated LoonWetland birdsn/an/a