This praying mantis appeared on the table in our back yard yesterday. The praying mantis or mantid (sometimes misspelled as ‘preying mantis’, as it is a hunter as well as seeming to adopt a position of prayer) is from the family of mantodea, a term for the species devised by the German entomologist Hermann Burmeister in 1838 from the Greek mantis, meaning ‘prophet’, and eidos, meaning ‘shape’. Prophet-shaped. Burmeister obviously had a sense of humour. More exactly Burmeister determined that it belonged under the Phylum of Arthropoda, the Class of Insecta, the Subclass of Pterygota, the Infraclass Neoptera, the Superorder of Dictyoptera and the Order of Mantodea. And, as my daughter pointed out, ‘mantodea’ sounds quite Welsh, though that is neither here nor there.
Mantises have two grasping, spiked forelegs in which prey – and sexual partners – are caught and held securely. According to the Wikipedia entry “Sexual cannibalism is common among mantises in captivity, and under some circumstances may also be observed in the field. The female may start feeding by biting off the male’s head (as they do with regular prey), and if mating had begun, the male’s movements may become even more vigorous in its delivery of sperm. Early researchers thought that because copulatory movement is controlled by a ganglion in the abdomen, not the head, removal of the male’s head was a reproductive strategy by females to enhance fertilisation while obtaining sustenance.” The second half of the clip is particularly revealing:
But wait, there’s more:
“The reason for sexual cannibalism has been debated, with some considering submissive males to be achieving a selective advantage in their ability to produce offspring. This theory is supported by a quantifiable increase in the duration of copulation among males who are cannibalized, in some cases doubling both the duration and the chance of fertilization. This is further supported in a study where males were seen to approach hungry females with more caution, and were shown to remain mounted on hungry females for a longer time, indicating that males actively avoiding cannibalism may mate with multiple females. The act of dismounting is one of the most dangerous times for males during copulation, for it is at this time that females most frequently cannibalize their mates. This increase in mounting duration was thought to indicate that males would be more prone to wait for an opportune time to dismount from a hungry female rather than from a satiated female that would be less likely to cannibalize her mate. Some consider this to be an indication that male submissiveness does not inherently increase male reproductive success, rather that more fit males are likely to approach a female with caution and escape.”
Close up, the mantis head looks very much like a classic representation of an alien:
In a 1957 B Movie, titled The Deadly Mantis, polar ice begins to shift southward following a volcanic eruption. But below the melting ice a praying mantis, 60 metres in length, lies trapped. The melted ice frees it and off it flies, wreaking havoc on a number of North American cities. My favourite line: “In all the kingdom of the living there is no more deadly or voracious creature than the praying mantis.”