BirdAnalyst
Family · Passerellidae · Passeriformes

New World Sparrows Population Trends

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

New World Sparrows 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
Saltmarsh SparrowWetland birds-91%1968
Henslow's SparrowGrassland birds-81%1968
Field SparrowForest birds-77%1968
Baird's SparrowGrassland birds-73%1969
White-throated SparrowForest birds-68%1968
LeConte's SparrowGrassland birds-65%1969
Eastern TowheeForest birds-63%1968
Lark BuntingGrassland birds-63%1969
Black-chinned SparrowArid-land birds-58%1970
Bachman's SparrowForest birds-54%1968
Seaside SparrowWetland birds-52%1968
Grasshopper SparrowGrassland birds-50%1968
Savannah SparrowGrassland birds-50%1968
Song SparrowForest birds-37%1968
Bell's SparrowArid-land birds-23%1971
Black-throated SparrowArid-land birds-7%1969
Chipping SparrowForest birds+1%1968
Sagebrush SparrowArid-land birds+3%1970
California TowheeArid-land birds+4%1970
Vesper SparrowGrassland birds+10%1968
Swamp SparrowWetland birds+11%1968
Clay-colored SparrowGrassland birds+11%1968
Canyon TowheeArid-land birds+12%1969
Lark SparrowGrassland birds+48%1968
Cassin's SparrowGrassland birds+66%1969
Rufous-crowned SparrowArid-land birds+95%1969
Botteri's SparrowGrassland birds+267%1971
Nelson's SparrowWetland birds+302%1970
Abert's TowheeArid-land birds+333%1971
Yellow-eyed JuncoForest birds+336%1976
White-crowned SparrowForest birds+365%1970
Green-tailed TowheeForest birds+434%1970
Spotted TowheeForest birds+485%1969
Brewer's SparrowArid-land birds+568%1969
Fox SparrowForest birds+650%1970
Lincoln's SparrowForest birds+791%1968
Olive SparrowForest birds+862%1969
Golden-crowned SparrowForest birds11×1982
American Tree SparrowForest birds86×1977
Rufous-winged SparrowArid-land birdsn/an/a