One of the 15 flies on WAnimals

Insects · Diptera · Oestridae

Torsalo

Dermatobia hominis

Not Evaluated

It has not yet been assessed against the IUCN criteria. See full glossary

The torsalo — known in Spanish as rezno, ura or tórsalo (Dermatobia hominis) — is a brachyceran fly. It is the only bot fly, or oestrid, that parasitises humans, and it also parasitises many other mammals. It is the only species in the genus Dermatobia.

Size

up to 1.8 cm

Diet

Carnivore

Feeds mainly on other animals.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Sighting difficulty

Unknown

Fun facts

  • GeneralIt sticks its eggs to other insects so that they deposit them on the skin of mammals and people.
  • It does not lay its eggs on the host: it catches mosquitoes and other biting insects in flight and glues its eggs to their bodies. When the mosquito lands on a warm-blooded animal, the heat of the skin makes them hatch. That strategy is called phoresy.
  • It does this because the adult is large, loud and conspicuous, and could not approach without being noticed.
  • The larva settles under the skin and breathes through a small central hole; the lesion is often mistaken for a bacterial boil and does not respond to antibiotics.
  • The adult looks like a bumblebee: yellow face, metallic blue abdomen and orange legs covered in dense hair.

Life cycle & biology

Skeleton type
Invertebrate - chitin exoskeleton (insect)
Habitat & environment
Rainforest and rural tropical country
Gestation / incubation
The larva spends between 5 and 10 weeks under the host's skin; the full cycle takes about three or four months
Litter / clutch size
From 100 to 400 eggs, spread among different mosquitoes over 8 or 9 days

Sources consulted: https://es.wikipedia.org/wiki/Dermatobia_hominis

Related species

Other species in the catalogue with the most in common with Torsalo — same habitat, park, country, tags or family.

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Based on what we already know about torsalo.

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