The dark morph of Southern Giant Petrel is almost identical to Northern Giant Petrel. The only difference is that the Southern has a pale green tip to the bill that from a distance makes the bill look uniform in colour, whereas the Northern has a red tip to the bill.
Ray Wilson owns the copyright of all images on this site.
They may not be used or copied in any form without prior written permission.
raywilsonphotography@googlemail.com