Kogin Ka (wanda kuma aka sani da kogin Gulbin Ka)[1] kogi ne a arewacin Najeriya. Ta samo asali ne daga jihar Zamfara, tana tafiyar 250 kilometres (160 mi) yamma zuwa jihar Kebbi inda ya haɗe da kogin Sokoto kimanin kilomita 100 kilometres (62 mi) kudu da Birnin Kebbi, jim kadan kafin shiga kogin Neja.
↑Jeje, C. Y.; Fernando, C. H. (1992). "Zooplankton
Associations in the Middle Niger-Sokoto Basin
(Nigeria: West Africa)" . Internationale Revue der
gesamten Hydrobiologie und Hydrographie . 77 (2):
237–253. doi : 10.1002/iroh.19920770206 .
ISSN 1522-2632 .