The bird population of the Delta totals more than 300 species, 70 of which extra-European. Five main types are registered: Mediterranean (heron, glossy ibis, small cormorants, bald eagle, stilt, avocete, tadoma, pelican), European (singing birds: reed nightingale, bunting, boicus, sea swallow, seagull, sea eagle, white-tail eagle), Siberian (trumpeter swan, plover, common loon, small snipe, crane), Mongolian (bald eagle, Danube falcon), Chinese (egret, mute swan, big cormorant, mandarin duck).