The Green Metallic Hoverfly

Today’s photos are of a metallic hoverfly which is known as Ornidia Obesa (Fabricius); it is also called the green hoverfly. metallic hoverfly Ornidia Obesa (Fabricius) metallic hoverfly Ornidia Obesa (Fabricius)The  Ornidia Obesa is found worldwide, and is considered by some to be beautiful. metallic hoverfly Ornidia Obesa (Fabricius)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. metallic hoverfly Ornidia Obesa (Fabricius) This specie of hoverflies has a bare wing membrane; and it only has two wings, as opposed to four in wasps and bees. metallic hoverfly Ornidia Obesa (Fabricius)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.metallic hoverfly Ornidia Obesa (Fabricius)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. metallic hoverfly Ornidia Obesa (Fabricius) metallic hoverfly Ornidia Obesa (Fabricius)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.metallic hoverfly Ornidia Obesa (Fabricius)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.

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3 thoughts on “The Green Metallic Hoverfly

  1. I love these guys. Their habits mystify me though. They seem to like to hover a foot or two from my face, facing outwards. I thought they were interested in me ’til I realized they were facing the other way. Then I thought they are hoping to catch small bugs near me but you say they eat nectar. Also, why are they using up energy hovering like that.

    1. Hi Margaret, I must say I sort of a love the green metallic hoverfly as well; for when I see one hovering nearby, it is an indication that I must thoroughly wash and clean that area where it hovering. In other words, I love the hoverfly for pointing out unclean areas in my yard.

      The main reason why hoverflies use up their energy to hover above certain areas is because they have found potential breeding grounds for them to lay their eggs. And the ideal breeding sites are those areas where there is decaying food, dead animals/birds, feces (especially dog feces), garbage, or decomposing plant materials.

      Other than that, their metallic colour is attractive.

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