New estimate of the number of breeding pairs of Great-winged Petrel Pterodroma macroptera on Tristan Island, South Atlantic
FLOOD, R.L. & ZUFELT, K. 2018. New estimate of the number of breeding pairs of Great-winged Petrel Pterodroma macroptera on Tristan Island, South Atlantic.
Marine Ornithology 46: 109
Received 21 May 2018, accepted 11 June 2018
Date Published: 2018/10/15
Date Online: 2018/7/16
Key words: Great-winged Petrel, Tristan Island seabirds, estimating seabird populations
The current estimate of the number of breeding pairs of Great-winged Petrels Pterodroma macroptera on Tristan Island is 1,000 or less. In the last few hours of daylight on 11 April 2018 we observed large numbers of Great-winged Petrels off the southeast coast of Tristan Island and estimated from this a breeding population of 3,000-4,000 pairs. This article details the initial observation and the method used to derive the estimate of the number of breeding pairs.
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