The incubation period of the ACAP-listed Black Petrel

A Black Petrel near its burrow on Great Barrier Island, photograph by Joanna Sims

Elizabeth ‘Biz’ Bell (Blenheim, New Zealand) has determined the incubation period for 110 eggs of the ACAP-listed Black Petrel Procellaria parkinsoni as to be a mean of 56.5 days, with a range of 42 to 71 days, based on information collected over 12 breeding seasons.

The information was collected as part of a long-term study of the Vulnerable petrel on Great Barrier Island/Aotea, and has been published in the journal Notornis.

Reference:

Bell, E. A. 2024. When one pair is enough: determining the incubation period for tākoketai | black petrels (Procellaria parkinsoni). Notornis 71: 57-58.

17 October 2024