Ghzil-Aghaj State Reserve (Azerbaijani: Qızılağac dövlət qoruğu), meaning golden tree, was established on July 3, 1929, by the Committee on Protection of the Ancient and Art Monuments of Azerbaijan on an area of 884 km2 on Ghizil-Agaj Bay at the southwestern shore of the Caspian Sea, in Lankaran District, southeastern Azerbaijan.
[3] The reserve was included in the list of UNESCO Ramsar convention "On internationally important swampy areas as the birds' residing places" together with Ag-Gel National Park.[4][5][when?]
Most species of birds included in the Red Book of Azerbaijan are found in the reserve and adjacent areas.
There are 54 fish species including clupea, caspian kutum, common carp, wels catfish, sander marinus, common bream, flathead grey mullet in the water basins of this reserve.
[2][3] (local name) (local name) (Qızılqaz) (Bəzgək) (Çəhrayı qutan) (Sultan toyuğu) (Qıvrımlələk qutan) (Qırmızıdöş qaz) (Qara leylək) (Mərmər cürə) (Ərsindimdik) (Fısıldayan qu) (Ağquyruq dəniz qartalı) (Kiçik qu) (Məzar qartalı) (Qırıldayan cüllüt) (Berkut) (Turac) (Dovdaq)