Real Faeries: Bird People

Real Faeries is a phenomenal blog with tremendous amounts of knowledge on the Fae, all given to two sisters by an elven man known as Mr. E.

There was a blog post back in 2014 describing Mr. E's encounter with "Bird People". As explained, these are bird-like Fae. They aren't necessarily avian humans, however their existence allows us to imagine the possibilities. It is described that they appear almost human but more so bird. Therefore, why can't there be humans also the same?