英文關鍵字
male
frog
peeper
spring
season
early
seasonal
sound
sounds
peep
peeping
noise
nocturnal
night
advertisement
attract
attraction
mate
mating
song
sing
singing
call
calling
high
pitched
wetland
vegetation
herpetology
outdoors
environment
environmental
natural
nature
north
america
ohio
united
states
wildlife
amphibian
animal
water
brown
wild
frogs
close-up
closeup
pond
macro
wet