Fig. 1

Total tsetse fly catches and sex ratio in Nigeria. All trapped tsetse flies regardless whether alive or dead are shown. A. Morphologically identified Glossina species are segregated according to the sampling region. Highest number of fly catches occurred in Yankari Game Reserve, Kainji Lake National Park and Old Oyo National Park (a). Low numbers of tsetse flies were caught in Cross River National Park and from Ijah Gwari (b). B. Sex ratio within the different species. *Two G. p. palpalis were collected in Yankari Game Reserve. **Two G. m. submorsitans from Old Oyo NP were later genetically identified as Glossina sp. ***Tsetse flies morphologically recorded as G. fusca were genetically identified as various Glossina species and were further referred to as Glossina sp. ****Glossina sp. refers to all unidentified Glossina species