DipteraTabanidae – Horse and Deer Flies

Tabanus gladiator

This record describes Tabanus gladiator (species). Recorded family: Tabanidae. Recorded order: Diptera.

Identification and Appearance

Tabanus gladiator - Tabanus gladiator
Contributed by Tony; Additional contributions by cotinis , v belov
FeatureDetails
Headfrons very narrow, about 6 times as high as width at base, parallel sided or slightly widened above. Antennae: dark reddish brown, basal portion of 3rd segment with prominent dorsal angle and deep incision. Palps: very long,dark, straplike, apex truncate (see head image above).
Thoraxreddish brown, fine hairs giving it a lavender tone. Wings: costal cell orange brown (leading edge of wing); brown spot at bifurcation of R4 and R5 (top spot on wing); cross vein at end of cell margined with brown (bottom spot on wing); cell R5 narrowed at apex (cell between the 2 spots).
Legsdark except apical half of fore tibia - pale.
Abdomenorange brown, sometimes with an indication of median black spots. Note that these are marks for females (message from Tony-2 to Cotinis 10/16/25). See images here and on iNaturalist for males. Female Plate:
Male

Classification

Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Diptera (Flies)
Family
Tabanidae (Horse and Deer Flies)
Subfamily
Tabaninae
Tribe
Tabanini
Genus
Tabanus

Imported taxonomy record. Source availability varies; see the source references and editorial policy below.

Habitat and Range

Geographic Range

Montana to Delaware, south to Texas and Florida

Seasonal Activity

May through October in Florida ; shorter season northwards.

Additional species information

Species notes from the sources

Etymology: Tabanus gladiator Stone 1935

About Flies: the wider group

Order-level background for Diptera, the group containing Tabanus gladiator. Species-specific details appear above.

Group overview

Diptera includes over 150,000 described species of flies, mosquitoes, and midges. Mosquitoes are the deadliest animal on Earth (CDC). Malaria alone causes ~249 million cases and over 608,000 deaths annually, mostly children under 5 (WHO). Vector-borne diseases account for over 17% of all infectious diseases, causing 700,000+ deaths per year.

Ecological role of the group

Despite their disease impact, flies are critical decomposers and pollinators. Hoverflies alone pollinate hundreds of crop and wildflower species. Flies are also the primary food source for many birds, bats, and fish. Forensic entomology relies heavily on fly species for crime scene analysis.

Economic and practical significance of the group

In the U.S., vector-borne disease cases tripled between 2004-2016, with over 640,000 cases reported in that period (CDC). Tickborne diseases doubled from 22,000 to 48,000 annual reports. Globally, mosquito-borne diseases cost billions in healthcare and lost productivity.

Recorded sources for this group: WHO, CDC, PNAS. Imported estimates may describe particular regions or reporting periods.

Explore Diptera families and species →

Photos of Tabanus gladiator (5)

Tabanus gladiator - photo 1
Contributed by Tony; Additional contributions by cotinis , v belov
Tabanus gladiator - photo 2
Contributed by Tony; Additional contributions by cotinis , v belov
Tabanus gladiator - photo 3
Contributed by Tony; Additional contributions by cotinis , v belov
Tabanus gladiator - photo 4
Contributed by Tony; Additional contributions by cotinis , v belov
Tabanus gladiator - photo 5
Contributed by Tony; Additional contributions by cotinis , v belov

Photo credits: Contributed by Tony; Additional contributions by cotinis , v belov

Frequently Asked Questions About Tabanus gladiator

What is Tabanus gladiator?

Tabanus gladiator is a species in the family Tabanidae, within the order Diptera.

How big is Tabanus gladiator?

♀♀ 22-25 mm (Stone, 1935)

How do you identify Tabanus gladiator?
FeatureDetails
Headfrons very narrow, about 6 times as high as width at base, parallel sided or slightly widened above. Antennae: dark reddish brown, basal portion of 3rd segment with prominent dorsal angle and deep incision. Palps: very long,dark, straplike, apex truncate (see head image above).
Thoraxreddish brown, fine hairs giving it a lavender tone. Wings: costal cell orange brown (leading edge of wing); brown spot at bifurcation of R4 and R5 (top spot on wing); cross vein at end of cell margined with brown (bottom spot on wing); cell R5 narrowed at apex (cell between the 2 spots).
Legsdark except apical half of fore tibia - pale.
Abdomenorange brown, sometimes with an indication of median black spots. Note that these are marks for females (message from Tony-2 to Cotinis 10/16/25). See images here and on iNaturalist for males. Female Plate:
Male
Where is Tabanus gladiator found?

Range: Montana to Delaware, south to Texas and Florida

When is Tabanus gladiator active?

Tabanus gladiator: seasonal activity - May through October in Florida ; shorter season northwards..

How we use and review source data. Source count does not imply independent verification.

Photo credits: Contributed by Tony; Additional contributions by cotinis , v belov. Contributors retain copyright over their individual contributions.