Nišava
The Nišava or Nishava( Bulgarian and) is a river in Bulgaria and Serbia, a right tributary, and with a length of 218 km also the longest one, of the South Morava.
Dwaar Kill (Shawangunk Kill tributary)
The Dwaar Kill is a tributary of the Shawangunk Kill in Ulster County, New York, in the United States.
The source of the Dwaar Kill is located in the Minnewaska State Park Preserve.
Sindh River
The Sindh River, a tributary of the Yamuna River, flows through the Indian states of Madhya Pradesh and Uttar Pradesh.
Salt Creek (Little Wabash River tributary)
Salt Creek is a tributary of the Little Wabash River, which it joins near Edgewood, Illinois, near the boundary between Effingham and Clay counties.
There are at least two other" Salt Creeks" in Illinois: Salt Creek( Des Plaines River tributary) and Salt Creek( Sangamon River tributary).
Salt Creek is about in length.
Panjang River
The Panjang River, a tributary of the Karnali, flows through north- western Nepal.
River Dodder
The River Dodder is one of the three main rivers in Dublin, Ireland, the others being the Liffey, of which the Dodder is the largest tributary, and the Tolka.
Helfenberger Bach
The Helfenberger Bach is a small river of Saxony, Germany.
It is a right tributary of the Elbe, which it joins near Dresden.
Gull River (Turtle River tributary)
The Gull River is a river of Minnesota.
It is a tributary of the Turtle River, a tributary of the Mississippi River.
Dwaar Kill (Wallkill River tributary)
The Dwaar Kill is a tributary of the Wallkill River that drains a area of Orange and Ulster counties in the U.S. state of New York.
It is the Wallkill's second- longest tributary after the Shawangunk Kill, whose course it parallels somewhat to the east.
Like the Wallkill and the Shawangunk, which also has a tributary named the Dwaar Kill, it flows in a northeastern direction toward the Hudson River via Rondout Creek.
Unlike them it flows entirely through rural areas.
Black Duck Creek (Ontario)
Black Duck Creek is a stream in geographic Osborne Township in the Unorganized North Part of Nipissing District in Northeastern Ontario, Canada.
It is in the Saint Lawrence River drainage basin, is a left tributary of the Jocko River, and lies entirely within Jocko Rivers Provincial Park.
Black Duck
Creek begins at an unnamed bog next to the community of Osborne on the Ontario Northland Railway.
It travels south adjacent to the railway, takes in one and then a second unnamed right tributary, and turns east.
The creek takes in an unnamed left tributary, and reaches its mouth at the Jocko River, immediately after that river flows out of its source at Jocko Lake.
The Jocko River flows via the Ottawa River to the Saint Lawrence River.

Question: Are both Helfenberger Bach and Dwaar Kill (Wallkill River tributary) located in the same country?
Answer: no