Dusky-capped Flycatcher
Dusky-capped Flycatcher has surged: up 221% on the route-weighted index since 1970.
About the Dusky-capped Flycatcher
The Dusky-capped Flycatcher (Myiarchus tuberculifer) is a North American member of the Tyrant Flycatchers (Tyrannidae). In this analysis it is grouped with the aerial insectivores.
- Size
- 4.5–9 in long (12–23 cm) — a small to medium flycatcher (typical for the family)
- Habitat
- Open airspace over fields, water and towns; nests in cavities, earthen banks or on structures.
- Diet
- Flying insects caught on the wing.
- Range
- Recorded on 16 Breeding Bird Survey routes across 2 states, most concentrated in the Sierra Madre Occidental.
- Family
- Tyrannidae · Aerial insectivores
Notable Dusky-capped Flycatcher Trends
No notable trend signals for Dusky-capped Flycatcher. See the full index history below.
Dusky-capped Flycatcher Population Forecast
If the recent trend holds, Dusky-capped Flycatcher is projected to stay roughly flat through 2029, near 0.02 (95% range 0.01–0.03). A 5-year backtest shows a typical error of ±12%, with 100% of held-out values landing inside the 95% band.
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.02 | 0.01 | 0.03 |
| 2026 | 0.02 | 0.01 | 0.03 |
| 2027 | 0.02 | 0.01 | 0.03 |
| 2028 | 0.02 | 0.01 | 0.03 |
| 2029 | 0.02 | 0.01 | 0.03 |
Where the Dusky-capped Flycatcher Is Detected
BBS routes recording Dusky-capped Flycatcher, sized by most recent count.
Dusky-capped Flycatcher Population Trend by State
| Arizona | +155% | 1970 | 14 |
| New Mexico | insufficient data | n/a | 2 |
Dusky-capped Flycatcher Population Trend by Region
Bird Conservation Regions are the ecological unit for trends.
| Sierra Madre Occidental | +39% | 1970 | 16 |
Dusky-capped Flycatcher Conservation Status
Our route-weighted index shows it up about 221% since 1970. Aerial insectivores have fallen sharply across the continent, a decline widely linked to dwindling insect prey.
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. Trend is a route-weighted relative-abundance index, not an absolute population.