Today’s photos are of a metallic hoverfly which is known as Ornidia Obesa (Fabricius); it is also called the green hoverfly. The Ornidia Obesa is found worldwide, and is considered by some to be beautiful. The green hoverfly is often mistaken for a wasp or bee; and like some species of hoverflies, the fly is known to move its front legs in front of its face to imitate the antennae of wasps. This specie of hoverflies has a bare wing membrane; and it only has two wings, as opposed to four in wasps and bees. This hoverfly has a very small antennae, as opposed to the long, often jointed antennae in wasps and bees. Its eyes are also larger than those of wasps and bees.
The Ornidia Obesa is incapable of stinging, and is harmless to humans.The green hoverfly spends much of its flight time hovering. It has a unique ability to hover, suspended in midair, then dart a short distance very quickly, only to hover again. This hoverfly can even fly backwards. The principal food source of the green hoverfly is nectar and pollen; this fly is known to be an important pollinators of many flowers.
I read in this pdf article that there would be no chocolate without flies – as fly pollination is essential for fruit production of cocoa trees; and the green metallic hoverfly is one of the fly pollinators of cocoa flowers.Although the adult hoverfly feeds on nectar from flowers, it also feeds on honeydew produced by aphids, and carrion.
The larvae (maggots) of the green hoverfly are voracious predators of plant pests; they are also known to feed on decomposing matter. These larvae, which live in stagnant water – such as sewage, help clean up and break down dead plants, and they feed on micro-organisms.