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Drone fly - Eristalis tenax on a white flower
Drone fly - Eristalis tenax on a white flower


Drone flies
The drone fly (Eristalis tenax) is a hoverfly and is common throughout the world. It is quite striking in appearance.
Hoverfly - Drone fly - Top view
Hoverfly - Drone fly - Top view
Eristalis tenax - Drone fly - Rear view
Eristalis tenax - Drone fly - Rear view
Drone flies are especially common in rural areas, (but are also encountered in populated areas), where they are often found in dunghills. They feed on nectar preferably from the sunflower family (Asteraceae) and the carrot family (umbellifers).
Drone fly - Front view
Drone fly - Front view
The female drone flies lay their eggs in sewage treatment plants and other muddy or foul waters. The larvae have a breathing tube, which is up to 100 mm in length. Therefore they are known as rat-tailed maggots. The larvae of drone flies develop to a body length of up to 20 mm. Due to the fact that they filter feculent particles from the water, they contribute to the clarification of water.
Drone fly
Drone fly
When the larvae of the drone flies leave the water they enter buildings in search of a place to become pupae. They are exterminated when they occur en masse. Since the drone fly shows few escape reflexes, it can be captured in the hand.
Drone fly - Eristalis tenax
Drone fly - Eristalis tenax
Adult drone flies are active from March to October. As the female drone flies overwinter, they also can be encountered outdoors on warm winter days.


Description of images / photos
Photography with Cameras
Nikon D3x, Nikon D300, Canon 50D
Image editing with Photoshop
1. Drone fly - Eristalis tenax on a white flower
2. Hoverfly - Drone fly - Top view
3. Eristalis tenax - Drone fly - Rear view
4. Drone fly - Front view
5. Drone fly
6. Drone fly - Eristalis tenax
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