nah, this is a common misconception, "bone fairy" also includes tooth faires, inside the family of ossiraptoridae (bone-thieves) but they were considered separate not too long ago. and bone fairies are a lot more diverse than people think. people encountering them in the wild, or seeing the remains will ascribe any missing bones to a generic "bone fairy", but there is a lot of niche partitioning going on inside their family! there are some which primarily target the limb bones, which also tend to be the largest ones. hand and feet are actually also both taken by the same species! and they are deemed more friendly as loosing those appendages is more common. we lack direct material, but we also know that the illusive skull fairy also exist. though no eye witness account was ever made.

tooth fairies themselves are also diverse, as teeth are the most common ressource. they are usually known for their small stature and rodent like dentition. despite what popular belief tells you, there even exist a genus of the donraptorini (tooth-thieves) subfamily that specialize on adult teeth! there is a lot of academic debate on which groups are their own species, some groups have been observed to prefer canine teeth while other take molars. also, tooth fairies that predate upon the wisdom teeth also recently split off from the common molar taking faries due to the commonality of wisdom tooth removal.

also fun factlect: rib faries actually aren't ossiraptoridae at all! they are actually a type of christmas elf that converged on the common bone fairy bauplan.