It is the zunzuncito, with the scientific name Mellisuga helenae , an endemic hummingbird from Cuba also known as a fly bird or "bee elf." It is the smallest warm-blooded vertebrate in the world, measuring less than two inches. Their feathers are brightly colored, red and metallic blue in males and bluish green in females. It emits a wide variety of whistles and buzzes.
Despite its small size, it flaps its wings at a rate of up to 200 times per second , allowing it to stay in the air while it sucks the flowers to obtain the nectar on which it feeds.
