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Yezoceryx sp.
Subfamily: Acaenitinae
Family: Ichneumonidae
Order: Hymenoptera
The genus has been confirmed by Ichneumon experts on iNaturalist. This is the first photograph, recognised by iNaturalist, to be of this genus in Australia.
The Ichneumonidae family falls into the superfamily Ichneumonoidea and in the order Hymenoptera.
Ichneumon Wasps and Braconid Wasps may look very similar and both fall into the Ichneumonoidea superfamily. One way to distinguish them is that the Ichneumon Wasps possess an extra vein on the forwings which adds a cell towards the end of the wing. I think that is present in the wasp in this photo, identifying it as Ichneumon.
In Australia there are some 2000 known species within this family and over 25,000 worldwide, which makes it one of the the largest of the insect families.
The long modified sting on the abdomen is the ovipositor so this individual is a female. Members of the subfamily Acaenitinae are parasitic and lay eggs on the larvae of wood boring insects, particularly those of Coleoptera.
Interestingly, the head and thorax resemble more aggressive, stinging wasps in the Vespidae family. Presumably this is a form of Batesian mimicry to deter potential predators.
References
inaturalist.ala.org.au/observations/108090106
Gauld, I. D. (1984). The Pimplinae, Xoridinae, Acaenitinae and Lycorininae (Hymenoptera: Ichneumonidae) of Australia.
www.biodiversitylibrary.org/page/2288108#page/263/mode/1up
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What can I say? I grew up gaming and learned that if you break enough objects you'll eventually find one of these. Lesson reinforced.
(If you're interested in shooting something like this I've made a how-to video and posted it to YouTube.)
Spraypaint/ Graffiti by 1UP at Train-Station Wedding in Berlin.
More Infos about Urban Art at Berlin Streetart Blog.