Sibley, a beloved ruby-throated hummingbird ambassador at the Georgia Audubon, has died. The bird passed away just before the new year. His handler said despite their best efforts to replicate Sibley's natural habitat, his health slowly declined.

Imagine a man going from 170 to 255 pounds before your next big trip. Ruby-throated hummingbirds fight for the chance to do just that near the end of...