Species: mink-mink harpy
Semi-closed species owned by NeonWabbit. Feel free to create your own non-canon, fan mink-mink harpies and let him know about them / provide proper credit (if you want).
A mink-mink harpy is distinguished from regular harpies by their ear antennae for sound and weather detection, spiked prehensile tails (females only, non-spiked otherwise), second pair of wings (dorsal tail wings for males, extra/smaller wing arms on the body for females), feline ears and lower half, and fur patterns matching those of any avian, feline, or primate species.
The flagship character/mascot of the species is Frie.
Additional biology and culture information, plus additional art, can be found on the work-in-progress WikipediNyah page here (though info there is always subject to change at any point)