BirdAnalyst
Species · Arizona · BBS 2025 Release · 1966–2024

Pine Siskin Population Trend in Arizona

All statesGeneralists

Pine Siskin in Arizona has surged: up 95% on the route-weighted index since 1970.

+95%Since 1970
21Routes In State
54Years

Notable Pine Siskin Trends in Arizona

long arc increasecomputed index

Pine Siskin has surged in Arizona: up 94% on the route-weighted index since 1970.

Pine Siskin Population Forecast in Arizona

If the recent trend holds, Pine Siskin in Arizona is projected to rise about 225% by 2029 — from 0.37 in 2024 to a central estimate of 1.2 (95% range 0.00–2.9). A 5-year backtest shows a typical error of ±95.3%, with 100% of held-out values landing inside the 95% band.

+225%Change by 2029
1.2Projected 2029 index
0.00–2.995% range
±95.3%Backtest error
19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20251.20.002.9
20261.20.002.9
20271.20.002.9
20281.20.002.9
20291.20.002.9

Pine Siskin Survey Routes in Arizona

Routes recording Pine Siskin in Arizona.
Alpine2420231992
Tsaile1920231993
Rucker1220081997
Dry Park1020241992
Mormon Lake919741968
Maine920121992
Sprucedale720231998
Mt. Graham420231995
Prescott320191976
Blue319871977
Williams220011993
Skull Valley220212021
Pinetop220221993
Happy Jack220241977
Black Mesa119951995
Round Rock119891970
Portal120231975
Flagstaff120221988
Sawmill120141988
Clay Spring120242024
Carr Mtn119901988

Pine Siskin Population Trend in Other States

alaskacaliforniacoloradoconnecticutidahoiowamainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.