Caspian tyulka
It is found in the Caspian Sea , also in the lower reaches of the rivers Volga , Ural , and possibly Terek . 
<triplet> Caspian Sea <subj> Volga <obj> inflows <subj> Ural <obj> inflows <subj> Terek <obj> inflows <triplet> Volga <subj> Caspian Sea <obj> mouth of the watercourse <triplet> Ural <subj> Caspian Sea <obj> mouth of the watercourse <triplet> Terek <subj> Caspian Sea <obj> mouth of the watercourse