For October, we follow the vast, though little understood migration of the European eel. We hear the tale of Merlin's apples, ponder why October's full moon is known as the Hunter's Moon, and wonder when the first frosts will reach us.

'As the Season Turns' is a podcast created by Ffern and presented by the nature writer and author of the Seasonal Almanac Lia Leendertz. Each episode, released on the first of every month, is a guide to what to look out for in the month ahead - from the sky above to the land below.