英文關鍵字
black
active
adults
animal
bird
birds
blurry
brown
compared
crowned
day
daytime
dusk
flapping
forage
forms
ghostly
gray
head
heavy
heron
juveniles
lake
light
long
longlimbed
may
name
nature
neck
night
nycticorax
plumage
plumes
relatives
river
roosts
scientific
spotting
stocky
streaking
striking
video
wetlands
white
wildlife
wings
are