Data from: Spatial and seasonal variation in thermal sensitivity within North American bird species

Responses of wildlife to climate change are typically quantified at the
species level, but physiological evidence suggests significant
intraspecific variation in thermal sensitivity given adaptation to local
environments and plasticity required to adjust to seasonal environments.
Spatial and temporal variation in thermal responses may carry important
implications for climate change vulnerability; for instance, sensitivity
to extreme weather may increase in specific regions or seasons. Here, we
leverage high-resolution observational data from eBird to understand
regional and seasonal variation in thermal sensitivity for 20 bird
species. Across their ranges, most birds demonstrated regional and
seasonal variation in both thermal peak and range, or the temperature and
range of temperatures of greatest occurrence. Some birds demonstrated
constant thermal peaks or ranges  across their geographic
distributions and while others varied according to local and current
environmental conditions. Across species, birds typically invested in
either geographic or seasonal adaptation to climate. Local adaptation and
phenotypic plasticity are likely important but neglected aspects of
organismal responses to climate change.