The earliest APT sites dated is from Vanuatu, which was found to be around 3,000 BP, corresponding to the initial migration wave of the Austronesians. These early sites are largely characterized by face motifs and hand stencils. Later sites from 1,500 BP onwards, however, begin to show regional divergence in their art styles. APT can be readily distinguished from older Pleistocene-era Australo-Melanesian cave paintings by their motifs, colour, and composition, though they can often be found in the same locality. The most recognizable motifs of APT (like boats) do not occur in cave paintings (or engravings) that definitely pre-date the Austronesian arrival, the sole exception being the stencilled hand motif. Some APT examples are also characteristically found in relatively inaccessible locations like very high up in cliffsides overlooking the sea. No traces of APT has been found in Taiwan or the Philippines, though there is continuity in the motifs of spirals and concentric circles found in ancestral petroglyphs.