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Oil Beetle: a slick performer

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Oil Beetle: a slick performer

I am not sure what I marvel at most, the bewildering complexity of nature or the dedicated research scientists who unravel it for the rest of us to understand! Seeing this oil beetle (Meloe proscarabaeus) climbing up our garage wall sent me running for the camera. I had seen oil beetles before but normally on the Purbeck coastal cliffs; I did not expect one in our garden.  I decided to look more deeply into its life style and what I discovered was, frankly, amazing! 

It seems that in spring the female oil beetle lays an enormous amount of eggs in soil, several thousand per batch and several batches per individual. The eggs soon hatch in to wriggling larvae with strong jaws and claws. They climb up on to the heads of dandelions and await the arrival of their host insects. When an insect comes along to feed on the dandelion the larva attaches itself but only a very few actually attach to the right host, a species of solitary bee! Those that make the wrong choice perish while the lucky ones cling on and are transported back to the bee's nest. Once there, it eats ONE egg! After that it turns its attention to eating the bee's food reserves, nectar and pollen. After several moults the larva turns in to a grub, pupates and emerges as an adult in spring ready to mate and start the complex cycle again. Now is that amazing or not?

Why an oil beetle? If attacked by a predator it emits an smelly, oily fluid that puts attacker off eating it! 


 

If you would like to see the complete series that this post is part of click here ---->
This nature note was written by ----> Peter Orchard
This nature nore was written ----> 3 years 2 weeks ago

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