Interestingly enough, the three-toed sloths of four of the islands (Colon, Bastimentos, Solarte and Cayo de Agua) and a few of the little islets next to them form an endemic dwarf form of brown-throated three sloth (though not a separate subspecies, as far as I know). This was the only sloth I saw on the islands, and while it did seem slightly smaller than the ones I saw on the mainland, the difference definitely isn't extremely noticeable either.
