> Why don't some wasps finish building their nests?

Why don't some wasps finish building their nests?

Posted at: 2014-11-15 
Not enough food would be the most likely reason.

The wasp may have met with a windshield .

I noticed a while ago, a paper wasp building it's nest on the side of my home. I'm very fascinated in watching insects work. Anyway, couple days later I also noticed the wasp never returned. And its nest was hardly half way completed. Anyone know much about this reason?