Smaller-brained birds shrink in response to climate change, Wash U study finds

In the past four decades, smaller-brained birds have been shrinking, but a Wash U study finds that’s less true of their bigger-brained counterparts. We revisit Sarah Fenske's February 2022 conversation with study co-author Justin Baldwin about what’s driving the changes, as well as his passion for birds both as a researcher and bird watcher.