Giant sex-crazed moths the 'size of a hand' have hatched due to the heatwave - and are on the hunt for a partner.
Experts say the recent warm weather has caused the moths to wake up and be very active after a flurry of sightings.
People have been taking to social media in 'horror' after spotting the large moths in their homes and gardens in recent days.
Wildlife experts say the Poplar Hawkmoth 'surprises' people due to its large wings - but it doesn't even get the chance to eat or drink while alive, M.E.N reports.
This is because the creatures, which are harmless, are only after one thing - sex - and they die as soon as they have mated.
David Benzaquen spotted a hawkmoth the 'size of his hand' on the wall of his house, describing it as an 'alien creature'.
He said: "It was quite strange. We saw it during the afternoon, around 3pm. I was in the back garden with my daughter and mother-in-law.
"Then we saw this alien creature - I wasn’t even sure it was a moth at first, it was huge. It was the size of a hand. I couldn’t believe my eyes. I think I was more scared than my daughter!"
Mike Jordan, Chester Zoo's animal and plant director said: "This is a poplar hawkmoth (Laothoe populi), which is a common British moth found right around the UK.
"It often surprises people because it is so large and it’s wings are quite distinctive. The adult moths do not feed at all, but the caterpillars, which are very large, feed on the leaves of poplar trees.
“It’s likely that the very warm weather we’ve recently had has caused the adult moths to hatch and be very active.
"People may have spotted them around artificial lights, as you can often find them resting on them in the morning.”
The Poplar Hawk - or Laothoe populi - species of moth featured in these photos appears over-sized, there are even bigger moths out there.
And if you're scared of moths, you might want to spare a thought for the humble Poplar Hawk - they're harmless, can't eat or drink, exist only to have sex, and then they die.
The moths fly at night but are attracted to light, so you might find them flying through open doors and windows, on railway platforms and anywhere lights are left on overnight.
Professor Ilik Saccheri, Professor of Ecological Genetics at the University of Liverpool ,previously said moths are 'in the business of having sex'.
He said: "They're totally harmless. During the daytime their main concern is not getting eaten by birds so they try and stay out of the sun and are completely inactive.
"They go to sleep as pupi for the winter then they pop out now. They are just in the business of having sex."