These little frogs (Litoria moorei) grow to about 10cm and live in a very small part of south Western Australia. Last year two found their own way into our little courtyard pond. This year we have four. If this exponential growth continues for another two years, we’ll be in big trouble 😀

Here’s a video I made: their calls, along with a closeup of one half-submerged and sun baking. They really do sound like motorbikes winding up.