The Hummingway are a rabbit-like race featured in Final Fantasy IV, Final Fantasy IV -Interlude-, and Final Fantasy IV: The After Years who live in the Hummingway Home on the Red Moon. Most of them can only speak by humming, but select few can speak in the human language.
They’re exclusive to Final Fantasy IV, and are somewhat of an inside joke.
The rabbit-like appearance of the Hummingways and their origins on the moon hearken to the myth of the Moon rabbit, a legend that interprets the markings on the moon as a rabbit grinding a mortar and pestle, in some interpretations the rabbit is using them to mix medicines. One legend says that the rabbit came to arrive in the moon when it threw itself into a fire to feed a starving man, and the man revived it and took it to the heavens to honor it for its generosity.
Hummingways are an exclusive race in Final Fantasy IV, just like Vieras are exclusive to Ivalice:
Viera is a race in the Final Fantasy series, exclusive to Ivalice. They first appeared in Final Fantasy Tactics Advance. All viera that have appeared in the franchise have been female, although male viera do exist.
But where did the latter come from? Maybe they do have origins from the moon. How to tell?
First, the hair that all of the Vieras have is white:
White hair tends to indicate dignity and skill (or simply obvious age), unless the character in question is a bishonen, in which case he is almost always a villain. If the character is a white-haired, dark-skinned woman, then dignity, skill or power is often implied, but the character is often also emotionally driven and portrayed as a “force of nature”.
This is like how Fran explodes with a Mist overload. But also consider that in anime:
the brightness of a character’s hair communicates how down-to-earth and otherworldly a character is. The darker a color, the more that character lives in the here and now – and the brighter, the more esoteric, distant, magical and surreal he/she is…With the extreme version of that trope, signifying “utter otherworldliness”, being plain white.
Second, consider the two jobs available to a Viera: a Salve-Maker and Wood-Warder. Salves promote healing of the skin or as protection. Very possibly, Vieras are in the ancient tradition of making medicine like the Rabbits of the Moon. When you get to the moon in Final Fantasy IV: The Complete Collection, they sell you items. So then, in the great tradition of the Hummingways, the Vieras are crafting potions.
A Wood Warder is more a guard. Yet they might also gather wood for the Salvers to grind powder into making the potions. In this sense, the wood’s for making mortars and pestles, the tools make salves.
Obviously, the Vieras’ and the Hummingways’ rabbits-like appearance doesn’t necessarily mean they share a common ancestry.
I guess Moogles in Final Fantasy XII are probably Hummingways that evolved on the earth too, huh?