Ajiyar Fajal na Dja (Réserve de faune du Dja, wanda aka fi sani da Réserve de Biosphère Dja), wanda ke kudu maso gabashin Kamaru, wurin tarihi ne na (UNESCO) da aka rubuta a cikin shekarar 1987. Dalilan rubutun sun hada da bambancin nau'ikan halittu da ke wurin shakatawar, kasancewar nau'ika-nau'ikan dabbobi masu shayarwa guda biyar masu barazanar, da kuma rashin damuwa a wurin shakatawar. Sabis ɗin Dja Conservation Services (DCS) ne ke gudanar da shi, wanda mai kula da mahalli ke jagoranta. Reserve ta sami gagarumin tallafi don gudanar da ita daga ayyuka da yawa da kawancen kasa da kasa da masu goyon bayan kiyayewa a Kamaru suka bayar. Kogin Dja kusan ya kewaye wurin ajiyar kuma ya samar da kan iyakokin ƙasa wanda ya ƙunshi 560,000ha. Ajiyar Fajal na Dja an ƙirƙira shi a cikin 1950 kuma ya zama Gidan Tarihi na Duniya a cikin 1987 kuma ya zama babban ɓangare na gandun dazuzzukan ruwan sama masu yawa waɗanda ke Kogin Konngo. Ita ce ɗayan mafi girma kuma mafi kariya a cikin yankuna dazuzzuka na Afirka tare da kusan 90% na yankunanta da suka rage babu damuwa.