英文關鍵字
avian
beak
bird
birdlife
birds
birdwatching
blue
boreal
calm
curious
estonian
european
feather
forest
green
nordic
northern
old
ornithology
passerine
photography
phylloscopus
sibilatrix
sitting
small
songbird
spring
summertime
warbler
wild
wildlife
wood
woodland
woods
world
yellow