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On 31 December 1970 an adult gannet was trapped on Horuhoru close to where it had been banded on 20 February 1954. It had been hatched on 19 December 1953, and was therefore slightly over 17 years and one week old. Here we describe the work undertaken in banding chicks on the islands in the Hauraki Gulf, to find where they go while developing from juvenile to adult plumage, and when and where they return to breed.