コラックス
animal
animalia
aves
avian
background
beak
bird
birding
black
blue
chordata
chordate
clever
common
corvidae
corvus
dark
fast
fauna
feather
flight
fly
flying
horizontal
intelligent
isolated
life
mountains
nature
northern
ornithology
outdoors
passeriformes
passerine
plumage
raven
sky
smart
wild
wildlife
wing