These aliens are a type of bird. They have two huge, powerful wings and four small, clawed legs, with a huge, wide tail,  art by by Elena Zhurikhina and Goro Fujita and Charlie Bowater, 8k, ultra realistic , lens flare, atmosphere, glow, detailed,intricate, full of colour, cinematic lighting, trending on artstation, 4k, hyperrealistic, focused, extreme details,unreal engine 5, cinematic, masterpiece