Two's company, three is inconvenient.
But in any case, all male frogs are equipped with dry thumbs,
which enable them to get a vice-like grip on their moist partners.
It's a case of first come, first served.
Living in such a humid environment means jungle frogs are less tied to puddles and pools.
And these even lay their eggs out of water.
There's little chance of them drying out, and up here they're safer from predators.
Surprisingly, it doesn't rain every day in a rainforest,
but more still falls here than anywhere else on Earth.
On average, over two metres a year.
A single tree can suck up hundreds of tons of water each year.
But the trees can't use all this water,
so much of it returns to the air as vapour, forming mist and clouds.
In the Amazon, the largest unbroken stretch of rainforest in the world,
half of all the rainwater that falls comes from clouds produced by the trees themselves.