I don't know what is happening here. I remember that I took a photo of something similar last year but I couldn't find it on my blog.
El Jefe took these photos at night. He said there was a huge black cloud of these wasps. He could hear the noise of the swarm. El Jefe, assistant blogger, also took a video but it was too dark to make it out.
They had poor Chloe the Rottweiler backed into a corner of the terraza. She was scared so he had to let her inside the house.
I wonder if chickens eat them. If so, they must have had quite a feast in the morning.
They even get inside the house, too. Our window screen keep out only the most stupid of insects. Thankfully, they were more interested in buzzing around the lamp and killing themselves than they were in stinging us.
I think these wasps may be coming from this type of nest. We have those nests all over. We've been lax about knocking them down when they first start building the nest. Plus they often build them where we can't easily reach.
The mass suicide continued for a couple of nights.