In theory, could ibises be used to deliver messages across vast distances in the same way that hawks or pigeons can?
So, I've lately been interested in transferring messages across vast distances. The YouTuber, Hello Future Me, did a study on the Fire Nation from Avatar: The Last Airbender. He says that one of the reasons why the Fire Nation is more advanced than the other ATLA civilizations is partially because of their ability to send messages across vast distances, thus delivering information more quickly.
I know that some ancient civilizations (Egypt, Greece, Mesopotamia, Rome, etc.) would use pigeons to dispatch information, but I couldn't find anything about hawks being trained throughout history to deliver messages. Hawks can be trained through a practice of falconry.
In my world, there is an Africa-inspired continent known as Zakuma, with many civilizations modeled off of real-world tribes and nations. I thought that ibises would be more appropriate in fitting with the Africa-inspired theme. Ibises have been seen as symbols of wisdom and intelligence in many African cultures, most famously ancient Egypt: Thoth, the god of wisdom, knowledge, scripture, and science is depicted with the head of an ibis.
So with this in mind, could ibises be trained to carry messages? Or was ATLA just using their own cartoon logic, and realistically, the only birds that can be trained to deliver messages are pigeons?
Above, is a drawing I did of a typical messenger ibis from the fictional Zakuman kingdom, Izwe Lomcebo (Place of Wealth).