英文關鍵字
america
animal
baltimore
bill
bird
birding
black
blackbird
branch
breeding
canada
central
cloudy
colourful
colours
common
conservation
costa
eastern
environment
forest
galbula
green
icterid
icterus
illinois
male
marion
migratory
mountain
national
nature
north
northern
orange
oriole
ornithology
outdoors
park
passerine
perched
primeval
rainforest
rica
small
songbird
south
southern
spring
tree
tropical
waiting
wildlife
yellow