Spiders use cutting edge technology to capture mouth-watering morsels.

sumptuous spider trapdoor constructed with twigs and silk

Sumptuous Spider trapdoor constructed with twigs and silk Credit: Vanessa Westcott

Today’s blog is all about spiders. With about 40,000 species of spiders, they’re on every continent except Antarctica and we have all come into contact with them. One of their roles is to control insect populations which 50% of spiders do by creating silk webs. But there are various other ways to capture prey.

One of the most intriguing ways is using a trapdoor.

Female trapdoor spiders can live 5-20 years in their burrow as morsels drop by and into their trap, an ingeniously built home butcher store. The twigs trip off silk wires informing the spider of the prey’s whereabouts. The burrow itself is some 30cm deep to maintain stable temperature and humidity. It is actually widened as the spider grows in size.

The lid is composed of leaf litter and the entire structure is coated with silk including a silk hinge on the lid. Notice the rounded rim and the edge of the lid to see how it ‘marries’ the ground to camouflage its presence.

The spider can stand behind the lid for days on end until the unsuspecting insect comes within the right range and position for an attempted catch which doesn’t always succeed. Patience is the name of the game. Basically their sole roles in life are to catch prey, eat and multiply.

The animal kingdom is replete with every type of subterfuge imaginable and even unimaginable for predators to capture their necessary diet fulfilling needs. In most cases spiders’ bodies are too narrow to ingest their prey directly and they have ‘juices’ to exteriorly digest and turn the prey into ‘mush’ which they then can ingest.

Silk producing spiders are in a worldclass of their own when it comes to such complex technology that man hasn’t yet figured out how the entire process works. Suffice here to say that the same silk producing spider can produce various types and strengths of silk depending on specific parts of the web it’s building and needs it has like with the trapdoor spider to wallpaper her house butcher shop.

Fauna will never cease to amaze man as to its complexity and capabilities. Abilities that each species will practice its entire life with no modification whatsoever. An innate behavior that is there from birth, that it doesn’t learn and is invariable for years.

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