Birds Riding Birds

No, I haven’t but in another context, birds frequently ride birds, which I have seen myself:
In Africa, smaller flycatching birds like Drongos or bee-eaters will regularly not only perch on mammals but also on the backs of large bustards and korhaans to catch the insects flushed by these birds strutting through the high grass.
Now we also have to check if fly-catching birds will occasionally perch on the backs of large migratory birds not to migrate but to get food! Well, any volunteers for Empid ID on a Turkey Vulture’s back?

I’ve seen a red-winged blackbird riding a great egret when it was wading.

The blackbird was dive bombing the egret, but the egret ignored it. The blackbird resorted to actually landing on the egret’s black, pecking and pulling at feathers. For a few seconds nothing happened, but eventually this made the egret take flight. Once the egret started to fly the blackbird also flew away.

It happened at the pond in Forest Park, and unfortunately I didn’t have a camera to take a picture.

Yes, I have seen this multiple times and have gotten pictures of redwinged black birds riding both redtailed hawks and bald eagles.