BirdAnalyst
Family · Calcariidae · Passeriformes

Longspurs & Snow Buntings Population Trends

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

Longspurs & Snow Buntings 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
Chestnut-collared LongspurGrassland birds-68%1969
Lapland LongspurGrassland birds+3%1984
Snow BuntingGrassland birds+639%1986
Thick-billed LongspurGrassland birds15×1969
Smith's LongspurGrassland birds19×1997