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Songbirds: Distribution Studies
Songbirds: Distribution Studies


Spatio-temporal trends in mercury exposure to New York songbirds: Correlations with climate, habitat, and projecting future change (2020)

Bald eagle mercury exposure varies with region and site elevation in New York, USA. (2020)

Mercury Exposure in Songbird Communities within Sphagnum Bog and Upland Forest Ecosystems in the Adirondack Park (New York, USA) (2020)

Initiating a pilot study to evaluate the distribution of nesting Black Rosy-finches in northwestern Wyoming

Black Rosy-finches (Leucosticte atrata) in Wyoming breed exclusively in alpine environments where snowfields and alpine tundra facilitate foraging and cracks in cliffs provide nest sites, making them vulnerable to habitat changes caused by climate change. This is one of the least studied species in North America; only an estimated five parties have documented finding nests.

BRI Lead Investigator: Carl Brown
Contributing BRI Staff: Vincent Spagnuolo

Project Overview

Project Overview

Black Rosy-finches are listed as a Tier II NSSU (U) species by the Wyoming Game and Fish Department. While occupancy status is known for many mountain ranges in Wyoming, it remains unclear or undocumented in others. Black Rosy-finches are high elevation obligate nesting birds, and their residency is closely tied to snowpack, so data are needed to assess future risk from climate change and to develop long-term monitoring protocols.
Project Components

Project Components

BRI biologists will survey sites in mountain ranges of northwestern Wyoming for evidence of breeding. An emphasis will be placed on historic or suspected breeding sites with summits that approach the lower end of elevations known to support Black Rosy-finches to investigate the effects of climate change. We will also visit ranges where breeding status is unknown or poorly documented to assist local managers in identifying the range of the species.

Spring captures of migrating Black Rosy-finches arriving at feeders will facilitate banding and sampling of birds. Color bands will help identify spring site fidelity and movements in the region, and will create the potential for identifying wintering sites. Surveys to locate nesting sites will help determine research sites for future study.


Project Team

BRI Staff:
Carl Brown
Vincent Spagnuolo

Volunteer Master Bander:
Katy Duffy

Wyoming Game and Fish Department:
Susan Patla


Project Collaborators/Funders

We would like to thank the Meg and Bert Raynes Wildlife Fund, Jackson, Wyoming, for providing funding to conduct this study.
Photo Credits: Header photo © Carl Brown; Black Rosy-finch © Katy Duffy; Banded Black Rosy-finch © Katy Duffy
Biodiversity Research Institute