uromys vika, also known as the vangunu giant rat and locally known as the vika, is a giant species of rodent that lives in trees. it is in the family muridae. the rat was discovered in the island of vangunu in the solomon islands in 2015, after years of searching based on local stories, and described in 2017. it was identified as a new species on the basis of its skull, skeleton and a detailed dna analysis.