Dragonflies look majestic and enthralling whirring above a pond, or as a rarer surprise through your waterless garden on a summer's day. However if a really big one accidentally gets into your house and starts banging off the walls and ceiling as you were peacefully watching Midsomer Murders, then you'll look on them a little differently and realise they most certainly wouldn't make good house pets.

And no, I didn't identify the species, though I can say for sure that they look much bigger and angrier indoors.