Fig 1. Illustration of the set up of quality assessment of sterile male flies during the tsetse eradication project in Senegal.

(A) Emergence of flies destined for release (RF group), (B) emergence of quality control flies (QC group) from pupae placed in a flight cylinder, and (C) monitoring of the survival of QC flies without food. Every morning, flies that had escaped the cylinder were collected from emergence cages (B) and put into circular colony maintenance cages for assessing their survival (1 cage per day).