This is hard because Swarm Intelligence crosses so many different disciplines. There are a few journals that focus on the topic, cross discipline, like: Swarm Intelligence from Springer, and IJSI, but in recent years most of the consequential work ends up in other journals that are not specific to SI.

Thank you Louis.

Swarm and Evolutionary Computation journal, it is link: https://www.journals.elsevier.com/swarm-and-evolutionary-computation

And Swarm Intelligence Journal: https://www.springer.com/journal/11721

See the links:

• https://www.journals.elsevier.com/applied-soft-computing
• https://www.springer.com/journal/11721