The Ember Stone: The Last Firehawk #1

Perodia is threatened by Thorn, a powerful vulture, who is using magic to spread a terrible darkness--but when a young owl named Tag, and his best friend, the squirrel Skyla, rescue a golden egg from Thorn's Tiger bats they may have found the key to Perodia's salvation: the last firehawk, guardian of the ember stone.