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False Firefly Beetle (Male) This was easy to identify as there is only a single species of Drilid. These are considered to be nationally scarce, but what makes this little beetle so special, is that it displays one of the most extreme forms of sexual dimorphism. The male, pictured here, looks like a beetle, can fly, and are found on flowers and foliage.<br />
The female however, looks more like a grub or caterpillar and lives on the ground amongst the leaf litter where they feed on snails. The larvae, well...I quote from Wiki..&#039;The eggs are laid in the soil under the litter and the young larvae of this beetle are covered with hairs. They are predators of terrestrial snails. Upon reaching maximum size (about 20 mm) the larva seeks out a snail shell in which to pupate. By clinging to a snail&#039;s shell via the suction cup on the terminal segment of the abdomen, the larva then bites the snail, injecting paralyzing venom that liquefies the snail&#039;s flesh with digestive enzymes. The flesh of the snail is then soft enough for the larva to burrow through the snail and enter the shell. Once installed, the larva undergoes hypermetamorphosis; the legs are reduced and the hair largely disappears. This secondary larva will overwinter in the snail shell before pupating.&#039; Beetles,Drilus flavescens,Geotagged,Isle of Wight,Summer,United Kingdom,insects,sexual dimorphism Click/tap to enlarge PromotedSpecies introCountry intro

False Firefly Beetle (Male)

This was easy to identify as there is only a single species of Drilid. These are considered to be nationally scarce, but what makes this little beetle so special, is that it displays one of the most extreme forms of sexual dimorphism. The male, pictured here, looks like a beetle, can fly, and are found on flowers and foliage.
The female however, looks more like a grub or caterpillar and lives on the ground amongst the leaf litter where they feed on snails. The larvae, well...I quote from Wiki..'The eggs are laid in the soil under the litter and the young larvae of this beetle are covered with hairs. They are predators of terrestrial snails. Upon reaching maximum size (about 20 mm) the larva seeks out a snail shell in which to pupate. By clinging to a snail's shell via the suction cup on the terminal segment of the abdomen, the larva then bites the snail, injecting paralyzing venom that liquefies the snail's flesh with digestive enzymes. The flesh of the snail is then soft enough for the larva to burrow through the snail and enter the shell. Once installed, the larva undergoes hypermetamorphosis; the legs are reduced and the hair largely disappears. This secondary larva will overwinter in the snail shell before pupating.'

    comments (11)

  1. Whaaat?! That is wild! Posted 5 years ago
    1. I know, it's insane isn't it! Posted 5 years ago
  2. The nature is genius! What a kind of parasitism! Added it to my list. Posted 5 years ago
    1. Never fails to amaze me! Posted 5 years ago
  3. Great find Clair, well done. Posted 5 years ago
    1. Thanks Paul!
      Posted 5 years ago
  4. First species in this family, excellent! Posted 5 years ago
    1. Yes, a very exciting find, for lots of reasons! Posted 5 years ago
  5. As a novice what is the difference between this and Porrostoma rhipidium

    Niel
    Posted 4 years ago
    1. Porrostoma rhipidium is only found in Australia I believe, whereas this one is in the UK. Both from different families etc. Sorry, I am not great when it comes to insects but I hope that helps! Claire Posted 4 years ago, modified 4 years ago

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''Drilus flavescens'' is a species of ''beetles'' belonging to the family Drilidae.

Similar species: Beetles
Species identified by Claire Hamilton
View Claire Hamilton's profile

By Claire Hamilton

All rights reserved
Uploaded Jun 24, 2020. Captured Jun 23, 2020 15:40 in 53 Perowne Way, Sandown PO36 9BX, UK.
  • Canon EOS 70D
  • f/11.0
  • 1/100s
  • ISO1600
  • 100mm