BirdAnalyst
Species · New Mexico · BBS 2026 Release · 1966–2025

Redhead Population Trend in New Mexico

All statesWaterfowl

Redhead in New Mexico has fallen sharply: down 70% on the route-weighted index since 1978.

-70%Since 1978TrendPercent 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 →
6Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
13YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Redhead Trends in New MexicoNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Redhead has fallen sharply in New Mexico: down 70% on the route-weighted index since 1978.

Redhead Survey Routes in New Mexico

Routes recording Redhead in New Mexico.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Maxwell1220251998
Capulin919931993
Wagon Mound619731973
Grenville419781977
Laborcita 2220242024
Laborcita119971996

Redhead Population Trend in Other States

alaskaarizonacaliforniacoloradoidahoiowakansasmichiganminnesotamontananebraskanevadanew-yorknorth-dakotaoklahomaoregonsouth-dakotatexasutahwashingtonwisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.