Saw this very strange hawkmoth yesterday. Unfortunately, it never stopped flying so the wings are blurred. With the clear wings, I suspect that it is a type of Bee Hawkmoth, but I have never seen anything like it before. There also appeared to be black and white appendages hanging down from the body of the moth which I thought at first were unexpanded wings. I looked at Vol. 3 of the moths of Borneo, but it did not appear to be there.
Sorry about the quality, but bee and hummingbird hawkmoths are very difficult to photograph clearly.