Aug 122013
 
Lethocerus insulanus - Giant Water Bug, Fish Killer or Toe Biter entered in the 'Animals Other Than Fish' category of the RNA Show, pisciculture competition.

Lethocerus insulanus – Giant Water Bug, Fish Killer or Toe Biter entered in the ‘Animals Other Than Fish’ category of the RNA Show, pisciculture competition.

First time entrant in the RNA Pisciculture competition (and ANGFA Queensland Secretary) Peter Johnson has received first prize in the ‘Animals other than fish’ category of the show for a 7 cm Giant Water Bug (Lethocerus insulanus). The display was put together by ANGFA Queensland President, Steve Baines.

Giant Water Bugs (Australia’s largest aquatic insect) are ambush predators. They will remain camouflaged until an unsuspecting fish, frog or other prey item moves within reach at which time they grasp and hold it, mantis style, with their powerful front legs. The syringe-like mouthparts are thrust into the prey allowing venom and digestive acid to be pumped into it. The bug will then suck the fluids from the prey, casting aside the carcass when done. Ekka steward Bill Smith described this behaviour as being remarkably similar to that of his friend’s  ex-wife.

Giant Water Bugs are one of the few native animals capable of preying upon juvenile cane toads and cane toad tadpoles. Checkout the profile at the Australian Museum.

This YouTube video demonstrates the predatory behaviour of a juvenile European cousin of Lethocerus insulanus.

 

 

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