Hilara (Empididae)

This species of the genus Hilara is flying over water with its legs touching the water surface.

In this animation (10X retarded) Hilara is crossing an air bubble. The collapsing air bubble is generating ring waves. The velocity of the inner ring is approximately 23 cm/s. The velocity of Hilara is two times faster.

Hilara touching the water surface with its legs. The fly and its mirror image are visible.

 

Animation (10 X retarded) of Hilara colliding with the water surface.

 

The landing of Hilara sp on a water surface, animation 150 times retarded. The legs remain stationary, Hilara is flying with the legs touching the water surface.

 The males of an other species of the genus Hilara are flying above the water surface without touching the water. Due to the flow of air from the wings, indentations in the surface are visible.

In this animation (15X retarded) the fly is visible along with its mirror image.

 

Part of a frame of a film.The camera is directed with its optical axis approximately 45 degrees with the water surface. So a fly with its mirror image are visible.

 

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