Earth's mythologies are filled with stories of bird people. These refer to an actual race that did interact with Earth in a distant past. These bird people, like many other species, come from the Lyra Constellation.
Lyssa Royal: "There is one group of entities who are mammals, yet are oriented toward Lyran principles (Lyra being the mother group), and whose features are very different from humanoid. One particular group resembles what you call alien. The body type of these entities would be what you call ectomorph, very thin, almost frail and birdlike. The facial structure is more angular, sharper, resembling a bird, though these are still mammals. The eyes are birdlike. The hair is not feathered, but is of a different quality that can resemble feathers, if you are not touching it or in close proximity to it. It was also ceremoniously adorned in a certain way that made it look like feathers. This was not intentional but simply their own expression. These entities are very cool and intellectual. They consider themselves primarily scientists, explorers and philosophers. They do not engage in galactic politics, but they do travel and visit. They have had interaction here on your Earth during some of the most influential civilizations - Sumerian, Egyptian. There was interaction in what you call the Indus Valley.
[Lyssa Royal: Excerpt of "Galactic Family, An Overview of Genotypes"]