Maron and the team's study determined that lesser goldfinch populations increased by 110.5% in Washington, 66.3% in Idaho, and 16.9% in Oregon between 2012 and 2022, as stated in the journal ...

Climate and landscape modification facilitate range expansion in Spinus psaltria (Lesser Goldfinch) across the Pacific Northwest. Ornithology, 2025; DOI: 10.1093/ornithology/ukaf013 ...

The study found that Lesser Goldfinch populations increased dramatically in Washington (110.5%), Idaho (66.3%), and Oregon (16.9%) between 2012 and 2022.

Lesser goldfinches (“lesser” because they are smaller than American goldfinches) can be found throughout the West, from as far north as Oregon, east to Oklahoma and Texas, and southward ...