Reuben loves playing with snails in the garden, but he also recently discovered an amazing iridescent green beetle.  My best guess is that it is a Thick Limbed Flower beetle – catchy name, eh?
Beetles are the biggest single group of life forms on Earth, making up 40% of all insects, and 25% of all species on Earth.  But none found in the sea (although water beetle uses bubble to breathe underwater in fresh water)!  Some are pests eg potato, death watch; others helpful for pest control eg ladybirds vs aphids.
The characteristic thing about beetles, apart from their armour plates, is that their front wings are not used for flight, but for covering up the body.
Mealworms (as eaten on “I’m a Celebrity…”) are actually beetle larvae!
The ancient Egyptians treated the Dung Beetle (Scarab) as sacred, as it appeared to grow out of the dirt without the need for females or eggs.
Thanks, Wikipedia!