Onbaa

Onbaa are beings that live in mountains with trees near the Land of Fire on Earth. They were considered a legend until Naruto Uzumaki took one to Konoha.

Biology
The Onbaa change dramatically as they grow, a cub Onbaa has a large amount of brown hair spread throughout the body, removing the regions of the face, ears, feet and hands. Their skin is light gray and their ears are small and pink inside, as they grow in their "adolescent" phase, their bodies get bigger and their hair gets whitish, when an Onbaa reaches adulthood, suddenly its body it changes quickly, with its body getting bigger and its hair grows completely white, its skin becomes black and its sclera, red, claws grow at the tip of each of its five fingers and its ear grows quite in size, becoming less pink than in its puppy phase.

Onbaa are also extremely strong, when they try to get a puppy off Naruto's back, they are unable. They also have a voracious appetite and never tire of eating their favorite food. Apparently, their strength tends to grow as a defense mechanism when they are in danger or when they want to protect something or someone. The Onbaa also seem to have a kind of mind control with their puppies, as when seen that Onbu tried to protect Naruto from being killed by his mother, but his mother convinced him to join her to kill Naruto, as Onbu's growth happened soon after this "mind control", it is likely that older Onbaa or parents will be able to accelerate the growth process.

Culture
Onbaa are very territorial and voracious, protecting their young from anything as seen when Onbu's mother tried to kill Naruto, even at no time did he try to hurt him. As much as they protect their young very much, it is likely that an Onbaa mother will leave her young alone when she goes hunting or something else, since Onbu was kidnapped by a bird when she was a child.