What created this web structure?

Seattle area, about 30 feet up in a tree. A few small dark flying insects were buzzing around it but I couldn’t see them clearly.

6 comments

I would guess it's a Hyphantria cunea nest, Fall Webworm. They're harmless, neat things
- They’re harmless, neat things
  
  Or, if you're an entomophobe, TREE HORROR.
- Is the Fall Webworm similar to Tent Moth Caterpillars?
  
  Living in NC & we get tons of tent moth caterpillars every year.
  
  They're adorably destructive lil foliage decimators.
  
  Yup, very similar! Although I'm pretty sure the idea that tent caterpillars are destructive is a myth? I read that they're very unlikely to cause any actual harm to the trees. I think it started just because humans consider the webs an eyesore?
They hit hackberries in my beck of the woods, worst part is the worm poo. Little black pellets, smaller’n a pinhead, piles up everywhere.

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