Avis Magica, an ambitious self-sustaining skyscraper housing a vertical aquarium, could wind up gracing the Miami skyline.

Latin for “Magic Bird,” the sweeping Avis Magica tower stretches 120 metres high with architectural elements reflecting avian features designed to generate the building’s own electricity and water. The futuristic concept was submitted by Romanian architecture firm Amarada as part of the DawnTown Landmark Miami design competition, which asked designers…