I don't know if most of you already know but 
and
are birds but I've seen many discussions and I think I finally have an answer. They're Jian birds. These birds have one wing each and they can fly only with each others help. As we see in Xayah animation she tries to fly but is unsuccessful but when rakan and xayah both recall they fly away so my theory is that they are Jian birds.
[vlad-salute]
Terozu3 votesHes a pheonix shes a harpy.
If you want actual birds, Rakans a peacock to Xayahs Raven.
PikaPow3r1 votesBut It makes a lot more sense for them to be Jian birds in my perspective
Terozu1 votesIm sure that had some impact on their design as a couple, but their actual designs and the types of birds they are, are a peacock and a raven, with designs reminiscent of Pheonix and a Harpy, which they were referred to as in development.
LuthianDelphi1 votesNo, theyre love birds ;3