What is this? Join us at 8pm on BBC2 to find out.
Paul Deane
Web Producer
Springwatch is back tonight at 8pm on BBC Two. So while you're getting a cup of tea, ready to settle down and watch, here's a little quiz to get you in the mood.
What's this?
>>>
UPDATED: Well done to everyone who got it right. It's a caddis fly larval case.
