This black and yellow insect just landed in my balcony about an hour ago and it won't leave. Looks like a wasp but I've never seen one this large before.
Any clue what it could be?
Thank you!

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http://www.askabiologist.org.uk/answers … p?id=11325

Paul has written in to say this is actually a wasp-mimic and is in fact a form of crane fly.

"This Fly is in the  family Tipulidae,and these are called 
Crane flies. This one is a wasp mimic,meaning it masquerades as a wasp so 
that insectivores will stay away from it. It's scientific name is Ctenophora 
elegans. It neither bites nor stings."