A five-year-old golden lion tamarin at the National Zoo has died.
Zoo officials say the small, endangered primate was euthanized Tuesday after months of treatment for chronic kidney disease.
A zoo spokeswoman says veterinarians first diagnosed the disease in June. The tamarin responded well to treatment and was returned to its exhibit a month later. But the animal took a turn for the worse Tuesday, and animal caretakers decided it was best to euthanize it.
The National Zoo has ten golden lion tamarins in its collection. The primates are native to Brazil's Atlantic coastal forest. The normal life expectancy for adults in captivity is about eight years.