So this is a nice one, a bit obvious and maybe not that amusing but I'm just a sucker for proverbs using nature related content.
So you know the expression "The apple doesn't fall far from the tree", right?
Or in other words "Like father, like son".
This is the Japanese version...
Reading: kaeru no ko wa kaeru
Meaning: like father like son; the apple doesn't fall far from the tree
Literally: the son of a frog, is a frog.
(insert frog noise here)