유럽황새의 부리는 붉은 색이지만 동양과 러시아 황새의 부리는 어두운 갈색입니다

Yes, sometimes using the scientific name helps.

    droopy

Firefly may have some work to do with this level of detail with bird beaks. For now if you add a specific color prompt, does it work?  Or perhaps a more specific name for the bird?