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Tag Archives: Portevinia maculata

Hoverfly: Portevinia maculata

30 Wednesday Apr 2025

Posted by sconzani in insects, plants

≈ 2 Comments

Tags

British hoverflies, hoverfly on Wild garlic, Portevinia maculata, Ramsons hoverfly, Wild garlic

I have one of you to thank for the inspiration for this post; through his comments on my recent post about Wild garlic, Philip Strange (who, if you don’t already know and follow him, produces a really interesting science and nature blog) reminded me to look for the hoverfly associated with that plant. And so I did. And here it is.

For those of you who don’t live in Britain, we are currently experiencing a week of high (for us) temperatures (this is probably our summer, and normal conditions will resume shortly), so, yesterday, a walk through a shady woodland seemed like a good plan. When I arrived at Cwm George, in the nearby town of Dinas Powys, I was delighted to find it was peak garlic time and, when I stood watching those patches of flowering Wild garlic on which sunshine streamed through the tree canopy, I was even more delighted to spot several small grey-patterned hoverflies, both perched on and hovering around the plants.

These are Portevinia maculata hoverflies, and they have a very strong association with Wild garlic (aka Ramsons), as their larvae mine the bulbs and stem bases of those plants. My guide book says that ‘Where Ramsons is abundant, this hoverfly is usually also abundant’ but Philip and I might both dispute that statement. In my local park, where I took the photos for my recent blog and where Wild garlic is prolific, I’ve never seen this hoverfly. So, I was really pleased to find it in good numbers at Cwm George.

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The helicopters of the insect world

24 Tuesday May 2016

Posted by sconzani in insects, nature

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Tags

Brachyopa, Epistrophe eligans, hoverfly, Portevinia maculata, Syrphus

My fascination with hoverflies continues, fuelled partly by their intriguing habit of hovering directly in front of me, as if checking out my human intrusion into their air space. Or maybe it’s just their curiosity. A friend told me to hold out my hand, palm down, for the little critters to use as a landing pad … and, you know, it actually works!

Here are four of my latest helicoptering friends.

160524 Epistrophe eligans Cathays Cem

My first newbie is Epistrophe eligans, discovered in Cathays Cemetery on 24 April. Their preferred habitat is sunny hedgerows and woodland edges, with a particular liking for Hawthorn and Blackthorn. Their yellow stripe patterns can vary a lot so I was grateful for the help of the experts on the UK Hoverflies Facebook group for an ID on this (and, in fact, on all my hoverflies).

160524 Syrphus ribesii Cathays Cem

Here’s another from Cathays Cemetery. It’s one of the Syrphus species, possibly ribesii, but it’s almost identical to Syrphus vitripennis and my photo doesn’t show enough detail to differentiate the two. This is one of Britain’s more common hoverflies so I hope to get a better photo eventually.

160524 Portevinia maculate Bute Park

I found this Portevinia maculata in Bute Park last week, flitting around in the Ramsons, its favourite plant. Its black and grey colouring make this an easy one to identify.

160524 Brachyopa sp forest farm

And last but not least, one of the Brachyopa species. At first, I didn’t realise this was a hoverfly, as its grey and brown colours are rather unusual, though they also make it easy to recognise … once you know what it is.

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About me

sconzani

sconzani

I'm a writer and photographer; researcher and blogger; birder and nature lover; countryside rambler and city strider; volunteer and biodiversity recorder.

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