Large Marsh Horsefly

Large Marsh Horsefly - Tabanus autumnalis

Description

Wing length is 13 to 16 mm and  16 to 22 mm in body length. A fairly large horse-fly. The dark abdomen has a central row of pale triangles and a dark and broad central stripe on the underside. The eyes lack stripes.

Similar Species

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

Identification difficulty
ID checklist (your specimen should have all of these features)
  • 17-21mm
  • eye without bands
  • antennae all black
  • abdomen with central row of pale triangles
  • ventral abdomen with a broad central stripe
Habitat

Wet grassland and marshy areas, especially when cattle are present. Often seen sunning on fences, not hovering.

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

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Additional images

All NatureSpot records