Danube bleak by the building of dams across many of the rivers. Landlocked populations survive in small rivers and reservoirs, breeding in the small streams above the dams. The main Caspian Sea population has found ways of spawning below the dams. Overfishing and pollution in the Caspian Sea could impact on the Danube bleak but in 2008 the IUCN Red List of Threatened Species listed it as being of "Least concern". The Danube bleak feeds on small crustaceans, worms, molluscs, insect larvae, insects and small fish. Male Danube bleaks assemble in May to July at spawning sites in fast flowing streams with
Crab-eating mongoose Crab-eating mongoose The crab-eating mongoose ("Herpestes urva") is a mongoose species ranging from the northeastern Indian subcontinent and Southeast Asia to southern China and Taiwan. It is listed as Least Concern on the IUCN Red List. Throughout its wide range there are many languages and therefore various common names for the species. In particular, according to at least some major dictionaries, the source of the species name "urva" (which at one time was also the name of the genus, as in: "Urva urva") was the Nepali language "urvá" or "arvá". The crab-eating mongoose is grey, with a broad white stripe