Who Lives In A House Like This?

This..creation..was made by Alfie and some random chap from a wildlife charity in Norfolk.
It's a house for bugs. They love it. I remember the man kept saying that 'they love it'.
I'm not convinced anything is in there. And if there is I want to know what/who?
Do they have bedrooms? A telly? Do they like living perched precariously on our Rowan Tree?