Brown Creeper Population Analysis
Brown Creeper has surged: up 672% on the route-weighted index since 1968.
About the Brown Creeper
The Brown Creeper (Certhia americana) is a North American member of the Treecreepers (Certhiidae). In this analysis it is grouped with the forest birds.
- Size
- 4.5–5.5 in long (12–14 cm) — a tiny tree-climbing bird (typical for the family)
- Habitat
- Woodlands and forest edges, including wooded suburbs and parks.
- Diet
- Insects and spiders gleaned from foliage and bark, with seeds and berries in season.
- Range
- Recorded on 1,035 Breeding Bird Survey routes across 37 states, most concentrated in the Northern Pacific Rainforest.
- Family
- Certhiidae · Forest birds
Notable Brown Creeper TrendsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →
No notable trend signals for Brown Creeper. See the full index history below.
Brown Creeper Population Forecast
If the recent trend holds, Brown Creeper is projected to fall about 16% by 2030 — from 0.34 in 2025 to a central estimate of 0.28 (95% range 0.22–0.34). A 5-year backtest shows a typical error of ±19.9%, with 60% of held-out values landing inside the 95% band.
Where the Brown Creeper Is Detected
BBS routes recording Brown Creeper, sized by most recent count.
Brown Creeper Population Trend by State
Brown Creeper Population Trend by Region
Bird Conservation Regions are the ecological unit for trends.
Brown Creeper Conservation Status
Our route-weighted index shows it up about 672% since 1968.
Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. Trend is a route-weighted relative-abundance index, not an absolute population.