It's probably a typographical error, easily done, just ask Philop or Philip.
Date: 10/13/08 21:01:21
Subject: [canberrabirds] White-bellied Sea-Eagle
"I wrote to Steve to mention that it is actually called Little Button-quail. You probably all know it but I am writing it to the list now, only because the slip has been repeated (although Barbara got it right). My reasons are entirely ornithological not just in spelling. Whilst it sounds the same, the difference is significant. It emphasises that the bird (and others of the family) are not quails and are very different from quails, apart from being similar in size and shape and terrestrial habits"
OK, but this causes me to wonder why it's White-bellied Sea-Eagle rather than White-bellied Sea-eagle particularly as the bird is nor a true eagle but a big kite, or is the hyphen the differentiating factor regardless of the upper-case E?