Goring-on-Thames, an event which created the Goring Gap. Headward erosion The Teays River, captured by the Ohio River. The Rio Grande which before capture flowed into a closed basin, Lake Cabeza de Vaca, but after capture flowed into the Gulf of Mexico. The ancestral Niger River captured what is now the upper reaches of the Niger which once flowed into an endorheic basin to the east northeast of Timbuktu. The River Stour, Kent, largely captured by the River Beult , River Teise and others. The River Wey, in southern England, the western arm of which is the former upper waters of the River Blackwater (River Loddon). The River Rheidol in Wales which has captured the headwaters of other streams and now runs for part of its length in a deep gorge. The River Lyd in Devon, England. The Black River, in Kings County, Nova Scotia, Canada, captured by the Gaspereau River The Casiquiare canal is a distributary of the Orinoco River that is currently in the process of capturing the upper reaches of the Orinoco. Karst The Donauversickerung (Danube Sink), currently developing in Germany, where a large portion of the upper part of the Danube river sinks into the limestone bedrock, and resurfaces in the Aachtopf spring, a tributary of the River Rhine. Glacier retreat The Slims River was previously fed by meltwater from the Kaskawulsh Glacier in the St. Elias Mountains in the Yukon and its waters flowed into Kluane Lake and on to the Bering Sea. Because of climate change, the glacier has rapidly receded and the meltwater no longer feeds the Slims. The water instead now feeds the Kaskawulsh River which is a tributary to the Alsek River and drains into the Gulf of Alaska. Effect on freshwater life River capture is a shaping force in the biogeography or distribution of many freshwater fish species. Australian freshwater fish The formerly massive Great Dividing Range runs the length of the eastern coastline of Australia and has isolated native freshwater fish populations east and west of the range for millions of years. In the last two million years erosion has reduced the Great Dividing Range to a critical point where west-to-east river capture events have been possible. A number of native fish species that originated in the Murray–Darling river system to the west are (or were) found naturally occurring in a number of coastal systems spanning almost the entire