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Most mosquito species, along with a host of other arthropods – including ticks, fleas, bedbugs, blackflies, horseflies and biting midges – require the protein in blood to develop a batch of eggs.

It was summer now, so the woods were a new and different place, alive with green and filled with birdsong and swarming mosquitoes and pesky blackfly.

Yet another, known as river blindness, occurs when the larvae of parasitic worms, transmitted by the bite of blackflies, migrate into the eye and cause blindness.

The disease is caused by the parasite Onchocerca volvulus, which is spread by blackflies, and often leads to irreversible blindness.

The 13th annual Adamant Blackfly Festival on Saturday includes a combination parade and fashion show, music and blackfly pie contest in which entries are judged on their taste and blackfly homage.