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Tag Archives: Eriothrix rufomaculata

Fly: Eriothrix rufomaculata

25 Friday Jul 2025

Posted by sconzani in insects

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Tags

bristly black and red fly, British flies, British insects, Eriothrix rufomaculata, fly, insect, parasitic fly larvae

Over the past week I’ve had several sightings of this little fly, Eriothrix rufomaculata, and, though I usually shy away from trying to identify flies, this one is very distinctive. Amongst the checklist of features to look for that are listed on the Naturespot website entry for Eriothrix rufomaculata are the ‘red abdominal side patches’ ♥, ‘silvery face’ ♥, ‘projecting mouth edge’ ♥, and ‘slightly shaded wings’ ♥. It’s also very bristly.

Though the adults are supposedly active from June to October, I presume I’m seeing more of these flies now due to recent hatchings. Look for them feeding on flowers, particularly umbellifers and flowers from the Daisy family, which includes everything from Ragwort to Fleabane, Yarrow to Hemp-agrimony, thistles to Knapweeds, and many more.

Like many creatures, these flies have a dark side to their life cycle: their larvae are parasitic, feeding on the larvae of various moth species, including the little grass moths (the Crambidae) and the very beautiful tiger moth species (the Erebidae).

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No flies on me!

06 Tuesday Sep 2016

Posted by sconzani in insects, nature

≈ 6 Comments

Tags

Coenosia sp, Dagger fly, Empis sp, Eriothrix rufomaculata, Eurithia anthophila, Flesh fly, flies, fly, Graphomya maculata, Sarcophaga sp

Do you ever get the feeling you’re being watched? Often, when I’m out on my wanders with wildlife, I get a little tingling in the back of my neck as if my extra-sensory perception is trying to tell me I’m being stared at. When I look around, there’s never a person or a bird or an animal but there’s often a fly, just sitting quietly on a leaf or a twig, minding its own business though focussing its gigantic eyes in my direction. Is it wondering if I’d make a tasty meal? Is it curious about what I’m doing? Is it staring in case I might turn up something it could eat? Is it monitoring a potential threat? Do flies think?

160906 1 Sarcophaga sp Flesh fly
160906 2 Coenosia sp (Muscidae)

I will never know the answers to those questions but their watchfulness has made me notice the flies around me and, amazingly, some of them are rather lovely little creatures. May I present to you: a Flesh fly (Sarcophaga sp.); one of the Muscidae family, Coenosia sp.; Eurithia anthophila; Eriothrix rufomaculata; a Dagger fly (Empis sp.); and Graphomya maculata.

160906 3 Eurithia anthophila
160906 4 Eriothrix rufomaculata

(By the way, that feeling of being stared at has a label, scopaesthesia, and, despite several series of scientific lab experiments, the phenomenon remains unproven. In my case, the tingling is probably a tiny spider I’ve picked up amongst the bushes.)

160906 5 Daggerfly Empis sp
160906 6 Graphomya maculata
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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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