Thanks, Seow. I've been collecting all the photos of individual shots of these two (A. major and A. amphimuta) and then putting them in a single folder. Over the past 12 years or so since I started shooting on DSLRs, I have something like 30-40 different individuals. I tried matching them against the ID keys and also your keen observations to add in more features that are consistent with these two. As you said, the features continue to overlap and give me headaches! These two species are relatively common in Singapore, and widespread. The one posted above was shot at Sg Buloh Wetland Reserve in the back-mangrove areas. Many of my shots were usually taken in deep primary and secondary forests, though I have not encountered this species in the urban parks yet.