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Tag Archives: ichneumon

I is for Ichneumon

14 Sunday Dec 2025

Posted by sconzani in insects

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British wasps, ichneumon, Ichneumon wasps, British ichneumons, Pimpla species, Campopleginae pupa, Ichneumon pupa

This has been a good year for sightings of Ichneumon wasps, and I have written a couple of posts about some I’ve found: Three Ichneumon wasps, on 19 August, featured my first Ctenichneumon panzeri record (now verified); Heteropelma amictum, found on the same day but not yet verified (the national Ichneumon recorder is currently working his way through what must be a huge number of national records – these voluntary verifiers do an incredible job!); and Ichneumon stramentor, a species I’d seen previously and which has been verified. Another first sighting, the handsome Tromatobia lineatoria, whose identity has also now been confirmed, featured in a second blog, Ichneumon: Tromatobia lineatoria, published recently, on 13 November.

There have, of course, been other Ichneumon sightings. One that I didn’t write about because I was rather unsure of its identification is shown above; it has now been verified as one of the Pimpla species. And in July I found a cocoon, which I recognised as having been created by an Ichneumon wasp but has now been confirmed as belonging to the subfamily Campopleginae. I’m hoping my luck at finding new Ichneumon species will continue in 2026.

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Ichneumon: Tromatobia lineatoria

13 Thursday Nov 2025

Posted by sconzani in insects

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Tags

British ichneumons, ichneumon, Ichneumon wasps, parasitic wasp, parasitoid of spider egg sacs, Tromatobia lineatoria

Different days, different ways, different directions …
I have no real plan for my daily walks but, recently, my feet have been taking me past the local park whose railings have turned up some nice insects in the past, and the location is again proving productive.

This handsome ichneumon is one of my finds from last week and, though it hasn’t been confirmed (there doesn’t seem to be anyone nationwide verifying ichneumon records, unfortunately), I think this is Tromatobia lineatoria. There is another very similar looking ichneumon, Perithous scurra, but the female of that species has a much longer ovipositor.

I was a little surprised to find an ichneumon this late in the year but the Naturespot website says this species can be found between May and November, so this is right at the end of its date range. The website entry also says this ichneumon is a parasitoid of spider egg sacs; there are plenty of spider webs strung along the railings so my sighting in this location is understandable.

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I is for Ichneumon

14 Saturday Dec 2024

Posted by sconzani in insects

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ichneumon, ichneumon wasp pupa, Ichneumon wasps, Ischnus inquisitorius, wasp pupa, wasps

I might not have seen many adult Ichneumon wasps this year but I was fascinated by the discovery of my first ever wasp pupa (An Ichneumon wasp pupa, 13 July).

241214 i is for ichneumon

And I’ve only very recently had verification that I did manage to spot one new Ichneumon species back in April this year. This is a female Ischnus inquisitorius, a wasp I’m having difficulty finding much information about. The Nature Conservation Imaging website reports that it’s ‘an ectoparasitoid of tortricid [a family of moths] pupae’ and the Wild Bristol website says it prefers well-vegetated areas like gardens and allotments, parks and cemeteries, presumably because these are the places where Tortricid moth larvae feed and pupate.

241214 i is for ichneumon Ischnus inquisitorius

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Another ichneumon

11 Friday Aug 2023

Posted by sconzani in insects

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British wasps, ichneumon, Ichneumon sarcitorius, Ichneumon wasps

As I mentioned yesterday, I found two ichneumon wasps on neighbouring umbellifers at Cosmeston last week. Their identities haven’t yet been confirmed but I think I’ve got them right, because their characteristics fit exactly the description in the Natural History Museum’s superb downloadable pdf, Beginner’s guide to identifying British ichneumonids. Today’s wasp is, I believe, a male Ichneumon sarcitorius.

230811 Ichneumon sarcitorius male (1)

The guide lists this ichneumon’s characteristics as follows:

Another of the medium to large (female=10mm, male=14mm) black-and-yellow or black-and-red species. The size, shape and precise colour patterns are distinctive to this species. … The males [which have black-and-yellow banding] are longer with broad white bands across the abdomen at the hind edges of the segments, with conspicuous indentations on the bands of the second and third segments. The bands on the first and fourth segments are usually broken. Both sexes have hind femora tipped with black.
Habitat: usually seen nectaring on umbellifers or flying through foliage hunting

230811 Ichneumon sarcitorius male (2)

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An ichneumon

10 Thursday Aug 2023

Posted by sconzani in insects

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Amblyjoppa fuscipennis, British wasps, ichneumon, Ichneumon wasps

I found two ichneumon wasps on neighbouring umbellifers at Cosmeston last week. Their identities haven’t yet been confirmed but I think I’ve got them right, and I’ll explain why in today’s post and tomorrow’s. Firstly, though, I must acknowledge my source for this – the Natural History Museum has an excellent downloadable pdf, Beginner’s guide to identifying British ichneumonids, which I always find very helpful when trying to identify these lovely wasps.

230810 Amblyjoppa fuscipennis fem (1)

Firstly, I believe this is a female Amblyjoppa fuscipennis, which the guide describes as follows:

A large (16–25mm) and beautiful species with a black head. It has a black thorax with a small cream spot and a bright orange abdomen – quite broad and no other colours on it. Can be confused with Protichneumon pisorius, but where P. pisorius has black tips on the hind tibia and tarsus, these features on A. fuscipennis are entirely orange. Flies from June to August.

230810 Amblyjoppa fuscipennis fem (2)

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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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