I am Startled at the True Face of the Third Man! What a Shock!

One bright moonlit autumn night, the Nutbrown Hares are both having trouble sleeping. As they lay quietly in a pile of leaves, they listen to the sounds of the night... swish, hoot, wobble, nibble, croak and splash! They go on a journey to discover what's making the interesting night noises, but will they work out what sound the moon makes?