Dr Gavin Broad, Curator of Hymenoptera at the Museum, setting up a light trap on his front porch.
Ophion obscuratus is widely distributed across the Palaearctic (Europe and temperate Asia).
The apparent range of O. obscuratus may have been counfounded with those of similar species (records from Argentina, for example, are certainly erroneous). Nevertheless, this is certainly a widespread and frequently abundant species.
Across Britain, O. obscuratus is one of the most frequently trapped nocturnal ichneumonids. It can be found in a variety of habitats and is particularly abundant in gardens.