英文關鍵字
adult
bank
beak
beautiful
behavior
bill
bird
body
brown
crane
ecology
environment
fauna
feather
food
gray
grey
large
leg
long
national
nature
park
pond
rest
sandhill
search
seek
siberian
stone
stony
tall
tourism
travel
tree
tropic
tropical
walk
water
waterfall
waterfowl
wildlife
wing