Narcissus Bulb fly (Merodon equestris)

Discover the Darker side of Hoverfly Ecology

Narcissus Bulb fly (Merodon equestris) 

Wing Length 8.5-10.25mm Body Length 10-14mm Flight late Apr-early Jul.

Species to spot in May

Have you ever planted bulbs that never quite made it to flowering, and you’re left wondering why? If you’re fairly sure they haven’t been dug up by a local grey squirrel, this hoverfly might be the hidden culprit.

It’s a remarkable species with around 34 different disguises, often easily mistaken for several types of bumblebee. The adults begin emerging from the soil from late April through to the end of June, so it’s well worth checking your bulb pots. You might spot one warming up in the sunshine or drying its wings on the leaves of your plants.

Spotted Thintail (Meliscaeva auricollis)

Spotted Thintail Hoverfly (Meliscaeva auricollis) Wing length 6-9.5mm. Flight all year.

Species to spot in February

Like my previous blog on the Marmalade hoverfly (Episyrphus balteatus) this is also a hoverfly that can be spotted all year round but generally peaks mid-summer with numbers boosted by incoming migrations. Being only the start of February when I write this article, they have already been spotted and reported on social media sites. So, on the next warm day I intend to find a sunny hotspot in the hope of getting a glimpse of one after awakening from its winter torpor. 

Hoverfly - Greater Hornet Plumehorn (Volucella zonaria)

Greater Hornet Plumehorn (Volucella zonaria) Size: 15.5-19.5mm Flight: May-Nov

Species of the week – 6^th October

This our largest hoverfly (In the U.K) and if you have seen one you can probably understand why it’s often mistaken for the European hornet Vespa crabo, and with good reason. Its markings mimic the hornet in both colouration and design, a classic example of Batesian mimicry. However, this hornet mimic will not sting, bite or get aggressive defending a nest, as doesn’t have one and is often seen late summer and into autumn on a warm day.