Marmalade Hover Fly

Fascinating facts about the Marmalade Hover Fly

• A single marmalade hoverfly larva can devour roughly 400 aphids before it pupates, turning it into a potent natural pest controller in cereal fields. The larvae live on land and feed exclusively on aphids, which makes them valuable allies for farmers. Because of this diet they are regarded as one of the main natural enemies of cereal aphids, helping to keep pest numbers low.
• During migration the flies usually stay below 300 m, yet many climb beyond 750 m and a few push almost to 1 000 m, showing an unexpected vertical range for such tiny insects. They are able to select favourable winds and even use airstreams above 150 m to aid their southward journey despite unfavourable conditions. This behaviour implies they possess an internal compass, probably solar, and can detect wind direction to navigate long distances.
• In May 2022, tens of thousands of dead marmalade hoverflies washed up on a southern-France beach, likely blown off course by strong winds during a massive spring migration. The sudden loss of so many individuals suggests a large-scale movement that year, even though the autumnal migration normally involves many more flies. Such events highlight how weather can dramatically affect the success of their seasonal journeys.
• Comparing migrating and overwintering individuals revealed extensive genetic differences, with at least 1 543 genes showing altered expression. These genes influence a wide range of physiological processes, including metabolism, muscle structure and function, hormonal regulation, immunity and stress resistance.
• Episyrphus balteatus is the most abundant native hoverfly across Central Europe, outnumbering all other native syrphid species in the region. It is a relatively small insect, measuring only 9-12 mm in length, and is found throughout the Palaearctic, from Europe to North Africa and North Asia. Its prevalence in gardens and fields makes it a common sight year-round, contributing heavily to pollination despite being less efficient than honey bees.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Marmalade Hover Fly

As the warm sunlight dances across the vibrant petals of a summer flower, a tiny, iridescent jewel flits into view - the Marmalade Hover Fly, its delicate, orange-hued body glimmering like polished amber as it hovers, suspended in mid-air, its wings a blur of motion. With an effortless elegance, it darts and weaves, its agile form weaving a intricate pattern of movement, as if performing a tiny, aerial ballet, utterly carefree and unencumbered. In this fleeting, golden moment, the Marmalade Hover Fly embodies the very essence of summer's joy and abandon, its beauty a poignant reminder of the simple, unbridled wonders of the natural world.

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