Dysmachus trigonus, the fan-bristled robberfly, is a species of robber fly (family Asilidae).Natural History Museum retrieved 7th Oct 2013animaldiversity retrieved 7th Oct 2013 It preys on other insects in flight.naturspaziergang retrieved 7th Oct 2013 Identification Body length 17 mm. long. Difficult to distinguish from other Dysmachus. Seguy (1927) Seguy, E, 1927 Faune de France Faune n° 17 Diptères Asilidae. 188 p., 389 fig Lechevalier editions (Paris: Éditions Faune de France) Wolff, Gebel and Geller-Grimm (2021), ( Majer (1997), van den Broek (1979), Stubbs and Falk (2001) all provide keys, descriptions and illustrations. Older works are also useful eg. Seguy (1920) Seguy, E, 1927 Faune de France Faune n° 17 Diptères Asilidae. 188 p., 389 fig Lechevalier editions (Paris: Éditions Faune de France) Verrall (1909 )(Oldroyd (1969)Oldroyd, H., 1969 Diptera Brachycera: Tabanoidea and Asiloidea (Handbooks for the Identification of British Insects 9/4) Royal Entomological Society, London. Verrall, G. H., 1909 Stratiomyidae and succeeding families of the Diptera Brachycera of Great Britain British flies Volume 5 London : Gurney and Jackson, 1909.BHL Full text with illustrations Majer,D.M. European Asilidae, in Papp L. & Darvas B. (eds.), Contributions to a manual of Palaearctic Diptera, volume 2 Nematocera and Lower Brachycera. Science Herald, Budapest (Hongrie), 1997, pp.549-567 van den Broek, R., Schulten, A., Wouwen N.(traducteur), Field Guide to the Robberflies of the Netherlands and Belgium, Éditions Jeugdbondsuitgeverij, 2017, 136 pages, (ISBN 9789051070545) Danny Wolff, Markus Gebel and Fritz Geller-Grimm: The Robber Flies of Germany: Discovering - Observing - Identifying . Quelle & Meyer, Wiebelsheim 2018, ISBN 978-3-494-01733-4
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