TianMa/天馬: Named Sky Horse But In Fact a Dog

TianMa/SkyHorse天馬 - Chinese Mythology Beast: In Fact a Dog

天馬(Tianma/Sky Horse) is a beast there whose shape is like a white dog with a black head. When it sees a person, it flies away.

又東北二百裏,曰馬成之山,其上多文石,其陰多金玉,有獸焉,其狀如白犬而黑頭,見人則飛,其名曰天馬

《山海經·北山經》