Interest Stacks

Bird talons as feet and wings for arms.
10/10 bird design.

This is the 2nd book in the Zhen series and features a different main couple. The couple from the 1st book are side characters in this one.

3rd book in the Zhen series.

Sparrows. Bird transformation & wings.
This one feels more like animals that are drawn as humans, than humans drawn as animals.

Bird wings for arms.
This one ALSO feels more like animals that are drawn as humans, than humans drawn as animals.

Tengu.
The main story is only 3-4 chapters. The additional chapters are one shots of different stories.

Tengu.

Tengu.

The main couple are chapters 1-8 and then the remaining chapters are the side couple's backstory, which is pretty intense. If you wanted something cute and fluffy then I would suggest only reading the first 8 chapters with the main couple.

Crows.

Bird transformation. Sparrows and they are drawn really cute!

Bird wings & eggs.

A bunch of oneshots by different authors. Chapters 3, 4, and 8 feature bird characters.

Here's a list of all chapters and what type of kemono/jingai they contain:
1 Wolf beastman and human prince prisoner (wolf head, super short)
2 Bunny x kitsune (ears/tails, cute, wholesome)
3 Owl god x blind human sacrifice (transformation, short)
4 Bird x human (bird head & wings, TW: rape)
5 Human and guy who transforms into a cat (cute, no smut, kinda short)
6 Human and minotaur (I didn't understand this one, no smut?)
7 Trees (no smut, super sweet and creative)
8 Birds (pretty much entirely bird, no smut, wholesome)
9 Dobermann x Scottish-fold (dog head, cat nose/ears/tail, cat is adult but looks young)
10 Gentleman goat beastman and acrobatic horse beastman (goat/horse heads)
11 Kitsune x kitsune (ears/tails, features a snake)
12 Story (no comic, wolf king x human bride, wolf head, somehow cute AND smutty)
13 Dragon/lizard? god x feather dog (no smut, wholesome)

Bird transformation.

Collection of oneshots. The 3rd story, Tokoharu no Kariudo, features a bird character.

Bird head, tail, and wings.

Sequel to Karasu no Kachou-sama!

Hawk x warbler pairing. Bird transformation & wings.

The art is really nice but the story is very heteronormative. This feels more like Josie than BL.

This is a collection of oneshots. Chapters 1 and 4 feature characters with bird wings.

Ch1: Aoki Kaze no Uta - tengu-like demon and a potter.
Ch4: Tsubamemaru - sword demon with wings for arms and his "owner".

Both of these oneshots are bittersweet.

This volume has 2 different short stories but I think they take place in the same universe? It's on my PTR list, so I'll update after I read it!
The first 3 chapters feature an owl-boy. He has wings and I think he can do a full transformation too!