Black Fly or Simulium damnosum blood feeding on
a human host at Daboese, Ghana. The tarsal claws on the first
pair of legs are upturned, possibly this helps to avoid alerting
the human host to its presence. Human infection by the nematode
Onchocerca volvulus is caused by the transmission
of the nematode through the intermediate host Simulium
damnosum, the resulting human disease is called African
River Blindness or Onchocerciasis.