英文關鍵字
active
activity
america
audubon
aviary
background
bird
birdcalls
birding
bough
calls
calming
cattails
caws
center
cicada
common
complex
complexity
conservation
crickets
distant
grasses
grassy
hide
hiking
inlet
insect
late
leafy
leans
listening
marsh
meadow
mean
meaning
natural
nature
noise
north
outdoors
perched
place
preservation
punctuated
quiet
raspy
recorded
recording
river
sanctuary
second
society
solitude
sounds
summer
swamp
tall
tidal
trail
trees
unpopulated
variety
vegetation
video
view
viewing
warning
wet
york