Threaten Sign    
 
 
 

                                               

Jumping Spider Mimicking 

We noticed one interesting behaviour of this planthopper. It mimics the Jumping Spider.
 
They like to rest on stems of about 10mm diameter. When we came close, they walked sideway and moved to the opposite side of the stem. This escape strategy was quite effective on stems of 10mm diameter. The group of planthoppers disappeared from our eyes in tenths of a seconds.
 
When we came more closer, they walk forwards or backwards along the stem. They seldom change their facing direction unless walking backwards and blocked by something. They jumped and flied away when we touch them by figures.    
 
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With more observations, we found that sometimes we confused the planthopper with the jumping spider Zenodorus orbiculatus which can also be found on the same host tree stems. Looked closer to the planthopper, we noticed the eyes pattern on the planthopper's frons, which made us think it was a jumping spider. 
 
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The planthopper may not look like a jumping spider in the human point of view. Imagine if you were an ant or a jumping spider walking along the 10mm thick stem. When you met the planthopper, most likely you will see the planthopper face to face. At this angle, the planthopper looks like a jumping spider. 
 
This also explained why the planthopper only move sideway, forwards and backwards but seldom turn around. For if it turns, the mimicking will fail. 
 
The jumping-spider-mimicking may help the planthopper to avoid some predators, such as ants and even the jumping spiders. We did see the Zenodorus orbiculatus prey on ant. 
 
Together with our observations on another planthopper Platybrachys vidua, its backwards movement and eyes-pattern on wing tips to mimic larger animal. We speculate the planthoppers adapted the backward movement first, and then eyes-pattern on frons and on wing tips individually in evolution later.
 
We have more discussions in our Mimicry and Camouflage pages.
 
 
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Last updated: November 07, 2006.