How do water striders move?

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How do water striders perform 'skating', 'rowing' and 'darting'?

 

Water striders have specially featured legs. They not only repel water but also configured to allow efficient and rapid movement across the surface.

Like all other insects, they also have three pairs of long legs.

Image by|Sweetaholic

The front legs are much shorter, and allow the water strider to quickly grab prey on the surface.

The middle legs act as paddles. The hind legs are the longest and provide additional power, and also enable the strider to steer and brake.

Image by|Ddzphoto

The long legs spread the insect body weight evenly on the water surface.

They move by skating in a slow, graceful glide or darting in a quick, spurting motion.

Skating is done when moving upstream against a current or getting to food and other striders. Gliding is done by ‘rowing’ with the middle legs.

Image by|analogicus

Water striders can dart a distance of 100 body lengths in a second. Darting is done whenever quick movement is needed, like to escape danger, pursue prey, or grab females.


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Are water striders dangerous?


Location: India

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