- [Narrator] A milk frog with his tadpoles.

(water gurgling) His loud calls are invitations to milk frog females to lay their eggs in his pool.

(frog croaking) Scientists believe that when a male tinctorius hears the calls of milk frog fathers, (frog croaking) he may decide that the milk frog's pool would suit one of his tadpoles.

(water sloshing) The next morning, he sets out again with another tadpole on his back.

(birds chirping) There's only one problem.

The milk frog's pool is over 60 feet up.

Getting there with a tadpole on his back will be a long climb.

Undeterred, he starts off again.

It's a huge effort for the sake of just one tadpole.

Made it, and he's not bothered by the milk frog.

Not only will his offspring be safe here, it'll also have plenty to eat because milk frog tadpoles are good food for tinctorius tadpoles.

But he can't rest just yet.

He still has one last tadpole which needs a pool.

This dad will go to extreme heights to find the best pools for his tadpoles.