Hover Fly

The size of hoverflies varies, depending on the species. Some, like members of the genus Baccha, are small, elongate and slender, while others, like members of Criorhina are large, hairy, yellow, and black. As members of Diptera, all hoverflies have a single functional pair of wings (the hindwings are reduced to balancing organs). They are brightly colored, with spots, stripes, and bands of yellow or brown covering their bodies. Due to this coloring, they are often mistaken for wasps or bees; they exhibit Batesian mimicry. Despite this, hoverflies are harmless.
With a few exceptions, hoverflies are distinguished from other flies by a spurious vein, located parallel to the fourth longitudinal wing vein. Their bodies are densely covered by bristles, and adults feed mainly on nectar and pollen. They also hover around flowers, lending to their common name.- Wikipedia