Animated butterfly

photorealistic animated butterfly including realistic flightpath. Animation of a white butterfly for a video in 4K. The animation should be supplied as quick time file with alpha channel. Butterfly will be approx 500 x 500 px in the image frame and will be the only image element on view. The butterfly should move around the image frame in to meet specific keyframes, but between these key frames should have erratic flight path. The animation must be photorealistic and must be of a professional film standard. The realistic motion is crucial. It should move in real time not slo mo. For example this is a very bad example and I would expect something much better: [login to view URL] This video is not very detailed but shows elegant fluid flight. [login to view URL] The clip will last 15 seconds.