Chrysops caecutiens

Chrysops caecutiens, common name splayed deer fly, is a species of horse fly belonging to the family Tabanidae.[1]

Chrysops caecutiens
Female of Chrysops caecutiens
Male on Leucanthemum vulgare
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Diptera
Family:
Tabanidae
Genus:
Chrysops
Species:
C. caecutiens
Binomial name
Chrysops caecutiens
Synonyms
  • Chrysops clarus
  • Chrysops crudelis
  • Chrysops fulvus
  • Chrysops hermanni
  • Chrysops hyalinatus
  • Chrysops ludens
  • Chrysops meridionalis
  • Chrysops niger
  • Chrysops nigrescens
  • Chrysops obsolescens
  • Chrysops obsoletus
  • Chrysops trifenestratus
  • Tabanus coecutiens
  • Tabanus lugubris
  • Tabanus maritimus
  • Tabanus nubilosus
  • Tipula nubilosus

Description

Chrysops caecutiens reaches a length of about 8.5–10 millimetres (0.33–0.39 in).[2] The mesonotum and the scutellum are glossy black with yellow-brown hairs. The compound eyes have red and green reflections, with dark spots. The transparent wings have dark brown patches, located at the top and at the centre of each wing. The abdomen shows distinct black inverted-V marking (hence the common name of "splayed" deer fly). The legs are black, included the tibiae on the middle pair of legs. They are active from May to September.[2]

Chrysops caecutiens

Biology

The larvae of the splayed deer fly feed upon algae and organic matter in damp muddy soils.[2] The adult female flies feed on mammalia blood (including on Capreolus capreolus),[3] in order for their eggs to mature properly. When they bite, they inject saliva with an anti-coagulating agent that prevent the blood clotting. The structure of the ommatidia in the midregion of the eyes of the females of these bloodsucking flies could subserve high polarization assisting in host-finding.[4] Adult males and females feed also on nectar and pollen of flowers (mainly Leucanthemum vulgare).[2][3]

Distribution

This species is present in most of Europe, in the East Palearctic ecozone and in the Near East.[5]

Habitat

These horseflies preferably live in shaded marshlands and in damp woodlands.[2]

gollark: Oh dear.
gollark: Can't you use `os.date("*t")` or something?
gollark: SSH from CC would be impractical but also cool.
gollark: I personally find the packet thing more convenient, as just having a plain stream means you have to work out some way of delimiting packets and whatnot for everything.
gollark: I mean, for I/O, mostly?

References
  1. Biolib
  2. J.K. Lindsey Commanster
  3. Global species
  4. Hansjörg Wunderer, Ulrich Smola Functional morphology of the retina of Chrysops caecutiens
  5. "Chrysops (Chrysops) caecutiens (Linnaeus, 1758)". 2.5. Fauna Europaea. July 23, 2012. Retrieved February 9, 2013.
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