英文關鍵字
anas
anatidae
and
animalia
anseriformes
are
aves
bread
chordata
class
clean
cold
creek
crumb
crumbs
day
dive
drake
dry
ducks
eat
family
feathers
female
females
fighting
flap
for
frozen
fuss
genus
homemade
kingdom
males
mallard
narrow
near
open
order
phylum
platyrhynchos
prettify
river
sedge
struggle
sunny
survival
swim
water
wild
wings
winter
wintering