Hunting the Hunter (Part 1)

You would think that a spider as robust (and venomous) as a huntsman spider (Sparassidae) would be pretty safe from predatory and parasitic insects. But not so. This article is the first in a series on the insects which make a meal of large spiders.

A few years ago I witnessed a titanic struggle taking place on a window at the front of our house. A large spider hunting wasp (or ‘spider wasp’) was pulling a huntsman spider backwards up the window glass.

Wasp and huntsman

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Said the Spider to the Fly

“Will you walk into my parlour?” said the spider to the fly;
“’Tis the prettiest little parlour that ever you did spy.
The way into my parlour is up a winding stair,
And I have many pretty things to show when you are there.”
“O no, no,” said the little fly, “to ask me is in vain,
For who goes up your winding stair can ne’er come down again.”

This early 19th century poem by Mary Howitt paints a picture of a cunning spider trying to entice a fly into its web. In real life web-spinning spiders don’t try to inveigle flies, or any other form of insect, into their webs. Spider webs are spun across an area where prey is likely to fly or wander through, and (hopefully) blunder into (and get entangled in) the web. According to research, spiders collectively consume somewhere between 400 and 800 million tons of insects per year. Spider webs work pretty well then!

Orb web

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Simply irresistible

The Grampians region of Victoria is one of Australia’s richest and most diverse flora areas. One third of Victoria’s flora is represented here so it is no surprise that the region was once dubbed “the Garden of Victoria” by the great botanist Ferdinand von Mueller.

Spring is an excellent time to see wildflowers throughout the region, especially terrestrial orchids such as the Mantis Orchid (Caladenia tentaculata) pictured below. It is one of the green-comb Spider Orchids and is common throughout the Grampians region. The colourful and flamboyant flowers of this orchid may be pleasing to the human eye but they are simply irresistible to certain male insects.

Caladenia tentaculata

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