• ABOUT
  • BIRDING 2018
  • Birding 2019
  • BLOG POSTS
  • Butterflies 2018
  • Resources

earthstar

~ a celebration of nature

earthstar

Tag Archives: gall flies

Fruitfly: Myopites inulaedyssentericae

18 Tuesday Aug 2026

Posted by sconzani in nature

≈ Comments Off on Fruitfly: Myopites inulaedyssentericae

Tags

British fruitflies, British gall flies, Common fleabane, Fleabane gall-fly, flies on Common fleabane, fruitfly, gall flies, Myopites inulaedyssentericae, Pulicaria dysenterica

This was the second new species I found last Sunday when walking around a local wildflower field, staring intently at all the Common fleabane (Pulicaria dysenterica). Despite all that staring, I’m amazed I noticed these, as they’re tiny. But, having said that, I was checking out fleabane on today’s walk and found another of these at a different location – and that really did amaze me as there are only three records of these in the Welsh national biodiversity database. Perhaps their tiny size means they’re easily overlooked.

As the blog name indicates, these are fruitflies, of the species Myopites inulaedyssentericae, which is a bit of a mouthful so perhaps you’d prefer their common name of Fleabane gall-fly, so called because their larvae create galls inside Common fleabane flowers. They can be identified by the pattern on their wings, and are on the wing during July and August.

Like this:

Like Loading…

Fly: Xyphosia miliaria

31 Thursday Jul 2025

Posted by sconzani in insects

≈ Comments Off on Fly: Xyphosia miliaria

Tags

British flies, fruit flies, gall flies, gall-causing flies, thistle gall flies, Xyphosia miliaria

Isn’t this a lovely looking little creature? Meet the fruit fly, Xyphosia miliaria, which seems to have a couple of common names: Mottled thistle fly (presumably because of its patterned wings) and Orange thistle picturewing. The adult flies can be seen on or around thistles any time from May through to September. Like Urophora cardui (see More galls, part 2, October 2017) and Urophora stylata (Urophora stylata gall flies, only recently published, on 2 July), Xyphosia miliaria causes galls to form on its host plant, though this little fly pierces and lays its eggs within the plant’s flower head not its stems. Also, unlike the Urophora species, which specialise in a single thistle species, this little fruit fly isn’t fussy about which thistle species it uses as a larval host.

Like this:

Like Loading…

More galls, part 1

03 Tuesday Oct 2017

Posted by sconzani in insects, nature, plants, trees

≈ 4 Comments

Tags

Cecidomyia salicis-folii, gall flies, gall midges, gall on Salix caprea, gall on willow, galls, Iteomyia capraea

Today’s and tomorrow’s galls are not on the gall-beleaguered Oak tree and, for a change, they are not caused by wasps, as so many galls seem to be. These two galls are caused by tiny members of the enormous order of flies, the Diptera.

171003 Iteomyia capraea on Salix capraea (1)

Today’s is Iteomyia capraea (sometimes known as Cecidomyia salicis-folii) (Cecidomyiidae is the family name for gall midges or gall flies). I think I would need better specs to actually see the midge that laid its eggs on this Goat willow (Salix caprea) leaf as it’s only 2-3mm long. Indeed, the galls themselves were pretty small (5-8mm), as you can see from the leafy picture below. When they hatch, the larvae of the midge feed within the leaf tissue causing the willow to develop a gall, sometimes on the midrib of the leaf, sometimes on a thick side vein. I’ve read one report that the larvae are white, another that they are an orange-red colour but I didn’t open up any of the galls for a look at the larva inside so I can’t confirm either report.

171003 Iteomyia capraea on Salix capraea (2)
171003 Iteomyia capraea on Salix capraea (3)

I’ve not been able to discover much about Iteomyia capraea. There are only 215 records showing in the NBN (National Biodiversity Network) database for the whole of Britain, 45 of which are in Wales, but I think that is more a reflection on the under-recording of galls that the rarity of the midge itself. Apparently, the species only breeds a single generation per year and they hibernate over winter in the soil underneath their host tree.

Like this:

Like Loading…

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.

View Full Profile →

Follow Blog via Email

Enter your email address to follow this blog and receive notifications of new posts by email.

Recent blog posts

  • Birling Gap and Beachy Head 22 October 2026
  • Devil’s coach-horse beetle 21 October 2026
  • Birds at Seven Sisters Country Park 20 October 2026
  • Seven Sisters Country Park 19 October 2026
  • A Beech mast year 18 October 2026

From the archives

COPYRIGHT

Unless otherwise acknowledged, the text and photographs on this blog are my own and are subject to international copyright. Nothing may be downloaded or copied without my permission.

Fellow Earth Stars!

  • famous65e373e926
  • mithrilmoon
  • toure16
  • Strivemindz
  • Jillian
  • lizzieiona
  • goateeironb98ef7f4ba
  • shannon
  • Rr
  • FrankieWoodknob
  • MLLESHOPPING
  • Fatima
  • Dan (Tai Chi Reset)
  • Robert Galpin
  • Tammie Rogers
  • fadingfun2d25f7d4de
  • MalcolmSafechuck
  • avenuepress
  • evie h
  • debbiestevens084bd32238
  • Dan (Calm Knees)
  • klindajames
  • joyfullycreation4f2bcb3356
  • lleuadwr
  • Kana Smith
  • havahay
  • aykutatila
  • shillingt
  • larrybridge
  • Hannes
  • The Michael Jackson Debate
  • Chris Soloman
  • supernaturallyd92135e67a
  • Jean Reiland
  • Alison Moya
  • UK Safari
  • Michael Jackson Facts
  • The New Renaissance Mindset
  • scotishhobbit
  • roverrowe
  • Bob Ramsak
  • boruma1977
  • moll3
  • Kayann
  • Dan (10-second balance test)
  • vivquinninwellington
  • Caleb Cheruiyot
  • joweb67
  • Matthew James
  • atanabalan

Powered by WordPress.com.

Loading Comments...
%d