CARACAS, Venezuela — The last of Venezuela’s glaciers has disappeared, scientists say, despite an unusual government effort to save it.

The demise of La Corona, downgraded to an ice field after shrinking from more than 1,100 acres to less than five, makes this South American nation the only one in the Andes range without a glacier — but it’s unlikely to be the last. Scientists, who long predicted the end of La Corona, say warming temperatures will render the entire Northern Andes, which snakes through Venezuela, Colombia and Ecuador, glacier-free by 2050.