Birds are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight yet sturdy skeleton. Birds live worldwide and range in size from the 5 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich. They are adapted for flight, with a streamlined body and wings modified as forelimbs. The wings are covered with feathers and are aerodynamically efficient, allowing most birds to fly. Some birds, however, like ostrich and penguins, have lost the ability to fly.
As you described an animal with feathers that fly, you can conclude that this animal is likely a bird.