Free images results:

Swarm pictures, stock photos and images


Swarm Royalty Free Stock Photography
Author: Ichtor
Lunch Stock Photography
Author: Danijelm

Also, here are some commercial RF-licensed images that match your search criteria:  
Bees swarm Stock Image
Author: Darkop

Explore more commercial options: More Swarm Stock Illustrations & Vectors | More Swarm Stock Video Footage