At least I have recorded it as White-throated in my notes, but nine years earlier I had recorded White-fronted as being at the zoo. It certainly has more white than the White-fronteds I have seen (Sewerby's are albifrons and look nothing like this), but has it as much white as the White-throateds Sewerby used to have or those I saw at Chessington? Over to any primate taxonomists.
