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Northern Giant Petrel
Macronectes halli

Along with the Southern Giant Petrel, these are the largest petrels at 81-94 cm in length with a 180 - 200 cm wingspan, slightly smaller than the Southern. The Northern and Southern were recently split and the colour of the bill tip is the diagnostic feature: Northerns have reddish tips and Southerns greenish. They occur all round the southern oceans and closer to the Antarctic in the summer.
 

Northern Giant Petrel

Northern Giant Petrel

1-2: Tasman Sea, off Wollongong, NSW, 23/06/2012.