John Holmes

E. caeruleus and E. axillaris have been split, as you might have guessed.

HK gets E. caeruleus as seen from "Birds of HK and South China", now properly named "Black-winged Kite" but it is named "Black-shouldered Kite" in older editions of the book, i.e. those published before the split.

The bird NOW known as "Black-shouldered Kite" is an Australian endemic.