英文關鍵字
animal
animals
aquatic
beak
beauty
bill
bird
body
brown
canada
common
crane
day
daytime
environment
eye
feather
feathers
full
goose
gray
grey
lake
large
legs
long
look
migration
migrations
neck
nobody
ornithology
outdoors
outside
park
plumage
pond
pose
red
refuge
sandhill
searching
spring
standing
walk
water
wetland
wild
wildlife
wings