英文關鍵字
amphibian
amphibians
animal
bicolored
black
breed
breeding
brummen
clamitans
clutch
common
deposit
dutch
edible
egg
eggs
esculentus
europe
european
fertile
flat
float
floating
frog
gelderland
green
holland
jelly
marsh
natural
nature
netherlands
pelophylax
plane
pond
rana
seasonal
spawn
spring
surface
transparent
voorstonden
water
white