| Scientific Name | Spizelloides arborea ochracea |
| Category | D |
| Taxon | Birds |
| Climate Change Vulnerability Score | Less Vulnerable |
The American Tree Sparrow (Spizelloides arborea ochracea) is a small sparrow (14 cm [5.5 in] long; 13-28 g [0.5-1 oz]) with a rufous cap and line through the eye; mostly plain, light-colored breast; and streaked back. It forages for seeds, berries, and insects in tundra, fields, hedgerows, and open forests. It winter in most of the lower 48 states in the US and breeds in northern Canada. The American Tree Sparrow will experience a high degree of climate exposure and has a high adaptive capacity. Overall, it has a Climate Change Vulnerability Index ranking of Less Vulnerable under both Representative Concentration Pathway (RCP) 4.5 and RCP 8.5 Scenarios. The American Tree Sparrow’s climate change vulnerability is impacted by factors related to movement and abiotic niche, which influence its ability to shift in space and respond to climate change impacts. It also has documented or modeled responses to climate change that impact its vulnerability score.
