英文關鍵字
animal
background
backgroundn
bird
birdsong
chaffinch
chorus
common
dawn
europe
european
familyn
female
ficedula
flycatcher
forest
fringillidae
hypoleuca
larch
male
muscicapidae
nature
old
passeriformes
passerine
pied
singing
small
song
spring
strobiles
the
tree
world