英文關鍵字
amphibian
animal
aquatic
beautiful
biology
breed
breeding
brown
clear
coitus
common
couple
egg
environment
fauna
female
frog
green
group
habitat
lake
life
love
male
mate
mating
nature
outdoors
pair
pond
reproduction
reptile
river
season
sex
spawn
spawning
spring
swimming
toad
together
underwater
water
wild
wildlife