英文關鍵字
animal
atricapillus
avian
beak
belly
biology
bird
birds
chickadee
eat
ecology
europe
feather
feathered
feeding
flight
fly
flying
food
house
nature
passerine
perch
perched
perching
poecile
portrait
seed
sitting
sunflower
tit
trough
wild
wildlife
wing