If you're a collector looking forward to getting the World Safari achievement for the Zookeeper title, this summer is your big chance to finally catch the seasonal Qiraji Guardling pet. Though not strictly associated with the Midsummer Fire Festival, this miniature Qiraji only spawns during the summer season. If you're looking to catch one, you'll find them in Silithus near the Scarab Wall... but with a bunch of zookeepers-to-be waiting for it to spawn, expect a crowd.
If you don't like fighting for spawn points, the Guardling should be around for a few months. While we don't have an exact date from Blizzard, its winter-only counterpart, the Snowy Owl, spawns from November to February. Happy hunting!