Species · Iowa · BBS 2025 Release · 1966–2024
Eurasian Tree Sparrow Population Trend in Iowa
Eurasian Tree Sparrow in Iowa has surged: up 14× on the route-weighted index since 2013.
14×Since 2013
8Routes In State
13Years
Notable Eurasian Tree Sparrow Trends in Iowa
long arc increasecomputed index
Eurasian Tree Sparrow has surged in Iowa: up 14× on the route-weighted index since 2013.
Eurasian Tree Sparrow Survey Routes in Iowa
| West Liberty | 18 | 2024 | 2011 |
| Williamsburg | 4 | 2023 | 2019 |
| Mt Hamill | 3 | 2024 | 2006 |
| Brooklyn | 2 | 2021 | 2014 |
| Mccallsburg | 2 | 2024 | 2024 |
| Bryant | 1 | 2023 | 2016 |
| Red Rock | 1 | 2024 | 2022 |
| Tipton | 1 | 2022 | 2022 |
Eurasian Tree Sparrow Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.