英文關鍵字
anas
anatidae
and
animalia
anseriformes
aves
chordata
class
clean
cold
day
dive
drake
dry
ducks
family
feathers
females
flap
genus
grass
kingdom
males
mallard
order
phylum
platyrhynchos
prettify
sedge
snow
snowing
sunny
swim
tweak
tweaking
wild
wings
winter
wintering