Large Marsh Horsefly - Tabanus autumnalis


Wing length is 13 to 16 mm and about 16 to 22 mm in body length. Tabanus autumnalis is a medium sized species of biting horse-fly. It is somewhat scarce compared to T. bromius and T. bovinus. It is quite a distinctive species with pale triangle markings on a dark body.

Similar Species

Tabanus bromius is similar but smaller with a body length around 14 or 15 mm. Tabanus bovinus on the other hand is largr than t. autumnalis, with a body length of 25 to 30 mm.

Identification difficulty

Wet grassland and marshy areas, especially when cattle are present.

When to see it

Peaking in June and July.

UK Status

This species which has previously been rather uncommon in Britain now seems to be extending its range.

VC55 Status

Status in Leicestershire and Rutland not known.

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map

Species profile

Common names
Large Marsh Horsefly
Species group:
Records on NatureSpot:
First record:
24/07/2007 (Ellison, Lorraine)
Last record:
28/07/2022 (Bennett, Simon)

Total records by month

% of records within its species group

10km squares with records

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