The mystery bird is now named Elektorornis chenguangi, with "elektorornis" meaning "amber bird." It was likely smaller than a sparrow and may've used the long toe to pull insects and other delectables out of tree trunks.
"It shows that ancient birds were way more diverse than we thought," said Xing. "They had evolved many different features to adapt to their environments."
Mold Pigs, a Hairy Snail and Other Cool Things Trapped in Amber