Here is the same bird a little while later - the sun was higher and had moved round a bit.
Here she is a bit later still.
Compare these photos with one from a year ago when the low early morning sun was directly behind me. This chap looks green.
Incidentally I haven't discovered a new species and there isn't really a black-winged kingfisher but in other parts of the world you can find a black-billed kingfisher and a brown-winged kingfisher.