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Tag Archives: British hoverflies

68!

07 Thursday Nov 2024

Posted by sconzani in autumn, insects

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British hoverflies, Epistrophe grossulariae, Epistrophe grossulariae larvae, fly larvae, hoverfly larvae, larvae on Sycamore leaves, leaf fossicking, Syrphus species, Syrphus species larvae

68! That’s the number of hoverfly larvae I found when turning over Sycamore leaves in a damp shady spot in one of my local parks last week. And they were all plump and well grown so had obviously been feasting well on aphids. (I have noticed during my leaf fossicking this year that, while insect numbers overall have been well down on previous years, the numbers of aphid seem about usual, which means that those creatures feeding on aphids seem also to have been thriving.)

241107 Epistrophe grossulariae

The hoverfly larvae were of only two types, the Epistrophe grossulariae shown above (these larvae are usually green but turn an orange-brown colour in the autumn, an effective camouflage tactic – hence the two colour variations shown here), and those from the various Syrphus species shown below (it’s not possible to be more specific as to the exact identification of these larvae).

241107 syrphus sp

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Lucky, unlucky

16 Wednesday Oct 2024

Posted by sconzani in insects

≈ 2 Comments

Tags

aphid, British hoverflies, hoverfly larva, ladybird, ladybird eating aphid, Syrphus sp larvae

The aphid-eating hoverfly larva (likely one of the Syrphus species) missed its chance here. As you’ll see, though, the ladybird was more on the ball and the aphid lost its second chance.

(I’ve set the video to mute as this park railing is next to a very busy road but I’m not sure that setting has worked, so best to mute your sound before viewing the video.)

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Hoverfly: Melangyna umbellatarum

03 Saturday Aug 2024

Posted by sconzani in insects

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British hoverflies, egg-laying hoverfly, egg-laying Melangyna umbellatarum, hoverfly eggs, Melangyna umbellatarum

My guide book, Britain’s Hoverflies (Ball and Morris, Princeton, 2015) says the Melangyna ‘is a challenging genus with several species which are very difficult to identify’, and I thought ‘Just my luck! I might as well give up now’.

240803 Melangyna umbellatarum (1)

Fortunately, I didn’t, and, as this particular species has a shiny thorax and pale, almost white abdominal markings, it proved easier than expected to identify my first ever hoverfly from this genus. This little beauty has now been confirmed as Melangyna umbellatarum, a female that was egg-laying on Hogweed in Cardiff’s Heath Park last week.

240803 Melangyna umbellatarum (2)

You may just be able to spot one of her tiny white eggs above her head in the top photo, and I was able to get a close up (photo above). This was also the first time I’d observed a hoverfly laying her eggs.

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A bumblebee and its mimic

11 Monday Mar 2024

Posted by sconzani in insects, spring

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Blackthorn blossom, Bombus terrestris, British bumblebees, British hoverflies, Buff-tailed bumblebee, Criorhina ranunculi, Large bearfly

Though there was a cold nor’easterly wind blowing, occasional sunny periods brought out a few insects during my visit to Cardiff’s Grangemoor Park last Friday, and I was lucky enough to spot a couple of Buff-tailed bumblebee (Bombus terrestris) queens feeding on Blackthorn blossom.

240311 buff-tailed bumblebee

Even better, on one tree I found one of Britain’s larger hoverflies, one that mimics bumblebees, a Large bearfly (Criorhina ranunculi), one that can often be seen in early Spring on the blossom of willows, Blackthorn and Wild cherry. This hoverfly’s tail end can be white, orange or red in colour (this one’s was reddish); to see these variations, and his superb images of this hoverfly, check out Steven Falk’s Flikr album.

240311 Criorhina ranunculi

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Out they pop

09 Tuesday Jan 2024

Posted by sconzani in insects

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British flies, British hoverflies, Buff-tailed bumblebee, early invertebrate emergence, Honey bee, winter insects

Invertebrates in the winter: some warm sunshine in a sheltered spot and out they pop: my first hoverflies of the year, several species of fly, a couple of Honey bees and a queen Buff-tailed bumblebee.
I should probably add that these images were taken on Sunday, before freezing Baltic air came blasting in from the east, causing temperatures to plummet. I imagine these critters have all now taken shelter once more, in amongst dense vegetation like Ivy or within cosy holes in the earth.

240108 invertebrates awake

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Hoverfly larvae

26 Thursday Oct 2023

Posted by sconzani in insects

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British hoverflies, Dasysyrphus species, Dasysyrphus species larva, Epistrophe grossulariae larva, hoverfly, hoverfly larvae, Syrphus species, Syrphus species larvae

It’s that time of year when, especially after rain, hoverfly larvae can be found washed off their leaves on to fence posts, railings and stones (e.g. gravestones), particularly under Sycamore trees. Twice in the past week I’ve checked the roadside railings of a local park and found several larvae each time, of three different species.

First, a little cannibalism. The first shot shows a Dasysyrphus species larva that has almost finished eating a larva of one of the Syrphus species of hoverfly. When I returned this way a couple of hours later, the Dasysyrphus sp. larva hadn’t moved far (image on the right) and almost looked like it was considering the snail as prey but I think that would be biting off more than it could chew!

This is just the second Epistrophe grossulariae I’ve seen so I was very pleased to spot it. If you’re wondering what it will grow in to, click this link.

Syrphus species larvae were the most abundant (as with many of these larvae, it’s almost impossible to identify them accurately unless they’re retained and breed through to adulthood). And, as a final treat (?), here’s a little video of one of those Syrphus larvae munching on an aphid (slightly gross but compelling viewing!).

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A rat-tailed maggot

03 Tuesday Oct 2023

Posted by sconzani in insects

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Tags

British hoverflies, hoverfly, hoverfly larva, hoverfly larva on Sycamore, Myathropa florea, Myathropa florea larva

‘What fresh hell is she sharing with us now’, I sense you thinking. For me, though, this was Sunday’s star find, something I’ve wanted to find for ages. This is the larva of a Myathropa florea species of hoverfly that I found living in a sap run on a Sycamore tree. The ‘tail’ is actually its breathing tube, a bit like a long snorkel.

231003 myathropa florea larva

When I spotted it at the edge of a cleft in the Sycamore, I used a stick to move it gently out into the open a little more so I could get some photos. I expected to have to nudge it back but, as you can see in this short video, it turned itself around and slowly undulated itself back in to its home in the puddle of watery sap, leaf litter and insects. Now to find more maggots!

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The mimics

01 Thursday Jun 2023

Posted by sconzani in insects

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British hoverflies, hoverflies mimicking bumblebees, hoverfly, insect mimicry, Red-tailed bumblebee, Volucella bombylans, Volucella bombylans var. bombylans, Volucella bombylans var. plumata, White-tailed bumblebee

You may have seen on social media and, indeed, be experiencing for yourself our ‘silent spring’, where the lamentably small numbers of invertebrates are causing grave concern. I have also found this – places where I would normally be seeing good numbers of bees, flies, butterflies and bugs are almost empty of life. So, I was even more pleased than usual last Monday when I spotted two Volucella bombylans hoverflies, one of each of the two colour variations, in a corner of a local field. These are bumblebee mimics, deliberately imitating bumble species so as to enter the nests of bumblebees to lay their eggs within.

230601 volucella bombylans (1)

Volucella bombylans var. plumata above mimics the White-tailed bumblebee (Bombus lucorum). I’ve included a photo of Bombus lucorum, above right, so you can see the two side by side. And, as you can see, the colouring of the second Volucella bombylans below is quite different. This is Volucella bombylans var. bombylans, which mimics the Red-tailed bumblebee (Bombus lapidarius) shown lower right. The mimicry isn’t perfect but it obviously works – if it didn’t, these hoverflies wouldn’t exist.

230601 volucella bombylans (2)

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Meliscaeva auricollis

14 Tuesday Mar 2023

Posted by sconzani in insects, nature

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British hoverflies, hoverfly, Meliscaeva auricollis

In just a few days we’ve gone from sleet and snow to a high of 11ºc. We humans can easily change our clothes to suit the conditions but the see-sawing temperatures must be creating problems for the insect world.

230313 meliscaeva auricollis (1)

Some, like these Meliscaeva auricollis hoverflies, emerge from their winter hibernation when the temperatures start to rise, then get knocked sideways when the mercury plummets and the snow starts to fall. Hopefully, they’re able to find shelter from the icy blasts so they can re-emerge at a later date.

230313 meliscaeva auricollis (2)

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First hoverfly

03 Friday Feb 2023

Posted by sconzani in insects

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British hoverflies, Eristalis pertinax, Eristalis tenax, hoverfly

During Monday’s walk along the local section of the Wales Coastal Path, I spotted my first hoverfly of the year, and immediately got the identification wrong. It seems that every winter I forget the basics for these creatures and have to refresh my memory over and over again (old age, or hoverfly blindness?).

230203 eristalis tenax (1)

In my defence, these are two very similar species but it took a friendly follower on Twitter to remind me that, for the hoverfly I found, the ‘feet are darker than E.[Eristalis] pertinax and it has a bendy rear tibia and hairy bands on its eyes so this is Eristalis tenax‘. (The ‘foot’ is the final segment of the leg.) To remind me, and help you, I’ve included comparison photos below – Eristalis tenax, he of the darker front feet, is on the left, and Eristalis pertinax, with the pale feet, is on the right.

230203 eristalis tenax and pertinax (2)

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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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