英文關鍵字
anatidae
animal
arctic
baby
biology
bird
birder
birding
birds
brood
childhood
cygnus
down
duck
edge
egg
fur
guide
habitat
hatch
huge
juvenile
lapland
learning
mallard
moss
muff
natural
nature
nest
nests
ornithology
outdoors
pond
reproductive
reservoir
shot
small
smear
soft
swamp
swan
swans
tufted
tundra
warm
watcher
water
wet
whooper
wild
wildfowl
wildlife
young