Warning, billions of frogs are on their way, once the supercolony of tadpoles in my swimming pool finish transforming into their final forms.

It came in early spring. Goo. Ejected up the sides of the pool, frogspawn, fittingly in the kids end - and then goo became bubbles which became black eyeballs that now wiggle about with tails.

Adorable, until one morning, when we see something while passing the stone edge of the pool. On the inner rim of the pool from the top of the murky water to the darkness below, a black rectangle.

The straight edges of it wiggled with a thousand little tails. Once your eyes adjusted, the whole rectangle vibrated. In a fleshy way, while barely reflecting any light, and even more distorted by the water refraction. 

And then we saw two more rectangles of future frogs, wiggling away, munching the algae on the side of the pool. Probably avoiding the newts, though they're too big to fit inside a newt now.