英文關鍵字
aerial
animals
aquatic
area
birds
black
clouds
conservation
danube
delta
dried
drone
ecology
environment
europe
field
freshwater
habitat
lagoon
lake
landscape
lowland
moisture
nature
nobody
outdoors
protected
reed
refuge
remote
river
romania
scenery
scenic
sea
sky
species
summer
sun
sunny
swamp
tide
travel
water
wetland
wild
wilderness
wildlife