Back in the 1980's, I worked in a local western-wear store and sold boots made of calfskin, steerhide, cowhide, bullhide, shrunken shoulder (stretched and specially tanned bullhide shoulder leather),shark, elephant, lizard, kangaroo, alligator, mule, elk, snake, eel, and of course, the king of the exotics, smooth skin ostrich and full-quill ostrich. They were tanned and dyed in every color of the rainbow, and some colors not found in nature!
I have often wondered what kept glove makers from using some of the exotic leathers in crafting gloves. Snake, eel, and lizard would not work. But shark and elephant are good, tough leathers that are very firm when new but break in beautifully. Mule is a very good, tough leather that also breaks in comfortably but firm in a boot, and should do the same in a glove. Elk might be too soft and spongy, as some have said buffalo gloves are ... I don't know. And ostrich, in spite of being so soft and pliable, is a very sturdy and tough leather, although it may be too thin a skin for glove-making.
Just wondering out loud, here ...

Yes, I still have my first glove.