This is a Harpy/Alien-Bird sim I've found that could draw some inspirations.
https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/9be437ed-727c-429c-aa72-65518792cbcc/ddkeipq-b68d4e56-1ebe-4d44-8d6e-61182d0a577f.png?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1cm46YXBwOjdlMGQxODg5ODIyNjQzNzNhNWYwZDQxNWVhMGQyNmUwIiwiaXNzIjoidXJuOmFwcDo3ZTBkMTg4OTgyMjY0MzczYTVmMGQ0MTVlYTBkMjZlMCIsIm9iaiI6W1t7InBhdGgiOiJcL2ZcLzliZTQzN2VkLTcyN2MtNDI5Yy1hYTcyLTY1NTE4NzkyY2JjY1wvZGRrZWlwcS1iNjhkNGU1Ni0xZWJlLTRkNDQtOGQ2ZS02MTE4MmQwYTU3N2YucG5nIn1dXSwiYXVkIjpbInVybjpzZXJ2aWNlOmZpbGUuZG93bmxvYWQiXX0.APYgegi2btznQlHombvhYzq8y2_K8kaZ5lrUfVe9P7Y
Edit: Some more ideas:
https://66.media.tumblr.com/fb1f1a2626ac204be828c1ccc5aa6128/tumblr_inline_npjtdnqwlD1rwr3wu_500.png
https://vignette.wikia.nocookie.net/nanatsu-no-taizai/images/4/49/Gloxinia_Full_anime.png/revision/latest/scale-to-width-down/340?cb=20191214185656
