We’re learning more about what they endure as they fly thousands of miles—and how humans and climate change are making it tougher for them.
This page is about the original Sibley eGuide to Birds app and has not been maintained or updated since then.It was replaced by theSibley Birds V2 appin 2018, which is being actively maintained and updated.As of Jun 2021 a few users are reporting that the old, unmaintained V1 app fails...