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# State of the Mountain Birds

Measuring the Population Health of Our Northeastern U.S. Montane Bird Species

## Sitemaps

- [XML Sitemap](https://mountainbirds.vtecostudies.org/sitemap.xml): Contains all public & indexable URLs for this website.

## Pages

- [Home](https://mountainbirds.vtecostudies.org/) - The Mountain Birdwatch annual analysis of montane bird population trends in the Northeast United States.
- [State of Mountain Birds Report: 2025](https://mountainbirds.vtecostudies.org/state-of-mountain-birds-report/) - The latest State of the Mountains Bird Report indicates steep and consistent declines for seven of the 10 bird species monitored through Mountain Birdwatch.
- [Bicknell's Thrush](https://mountainbirds.vtecostudies.org/birds/bicknells-thrush/) - Mountain Birdwatch data suggest that Bicknell's Thrush populations have declined by almost 50% since 2010 in Northern New England and eastern New York.
- [Blackpoll Warbler](https://mountainbirds.vtecostudies.org/birds/blackpoll-warbler/) - Mountain Birdwatch data suggest that Blackpoll Warblers are in steep decline within the Northeast United States.
- [White-throated Sparrow](https://mountainbirds.vtecostudies.org/birds/white-throated-sparrow/) - Mountain Birdwatch data suggest that White-throated Sparrows are one of the fastest-declining bird species in the mountains of the Northeast.
- [Fox Sparrow](https://mountainbirds.vtecostudies.org/birds/fox-sparrow/) - Mountain Birdwatch data suggest that Fox Sparrows are numerically stable in the Northeast, but increasing geographically.
- [Hermit Thrush](https://mountainbirds.vtecostudies.org/birds/hermit-thrush/) - Mountain Birdwatch data suggest that Hermit Thrush have declined by more than 60% since 2010 in the mountains of the Northeast.
- [Swainson's Thrush](https://mountainbirds.vtecostudies.org/birds/swainsons-thrush/) - Mountain Birdwatch data indicate that Swainson's Thrush populations in the Northeast mountains have declined by almost 30% since 2010.
- [Winter Wren](https://mountainbirds.vtecostudies.org/birds/winter-wren/) - The numbers of Winter Wrens counted during Mountain Birdwatch surveys in the Northeast US have been declining since at least 2012.
- [Boreal Chickadee](https://mountainbirds.vtecostudies.org/birds/boreal-chickadee/) - In our region, sizable populations of Boreal Chickadees only occur in Maine, New Hampshire, and the Adirondacks of New York.
- [Black-capped Chickadee](https://mountainbirds.vtecostudies.org/birds/black-capped-chickadee/) - Most of us probably don’t think of Black-capped Chickadees as a montane species, but this species readily adapts to human-modified mountain summits if there’s human presence.
- [Red Squirrel](https://mountainbirds.vtecostudies.org/birds/red-squirrel/) - During those summers with squirrels at high elevations, squirrels exhibit a substantial effect on the nest survival patterns of spruce-fir birds.
- [Yellow-bellied Flycatcher](https://mountainbirds.vtecostudies.org/birds/yellow-bellied-flycatcher/) - Yellow-bellied Flycatcher populations in our region have declined by more than 30% since 2010.
- [Climate Change](https://mountainbirds.vtecostudies.org/climatechange/) - Climate change is progressing and adversely affecting our montane plant and animal communities in the Northeast United States.
- [The Community Scientists](https://mountainbirds.vtecostudies.org/about/the-community-scientists/)
- [Conservation Actions](https://mountainbirds.vtecostudies.org/conservation-action/) - Mountain Birdwatch was primarily designed to provide actionable information for the conservation and management of our montane ecosystem. Here are some highlights of how we and others have used the data collected by Mountain Birdwatch community scientists to help achieve our goals.
- [Publications](https://mountainbirds.vtecostudies.org/about/publications/)
- [Methods](https://mountainbirds.vtecostudies.org/methods/) - Mountain Birdwatch predominantly uses hierarchical Bayesian binomial N-mixture models to analyze the mountain of data collected by our cadre of field-savvy community scientists.
- [404 / Page Not Found](https://mountainbirds.vtecostudies.org/page-not-found/) - We're sorry, you've wandered off into the mountains!
- [Focal Species](https://mountainbirds.vtecostudies.org/birds/) - We track populations of 10 bird species (and red squirrel) with the Mountain Birdwatch project in the Northeast United States.
- [Making Sense of the Numbers](https://mountainbirds.vtecostudies.org/making-sense-of-the-numbers/) - We use data collected by community scientists participating in Mountain Birdwatch to assess the state of the mountain birds.
- [About](https://mountainbirds.vtecostudies.org/about/) - Mountain Birdwatch is about the birds, but it doesn't happen without people. It takes hundreds of dedicated community scientists and an organization committed to the endeavor.