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MarineCavity nestLarge · 311 g
ID tip
As all three of the species in the Pterodroma feae/madeira/deserta complex were once believed to be subspecies of a single species: Pterodroma mollis, the extreme difficulty in telling them apart is easily understood. A summary of data from a morphological study sheds light on the issue: In overall size feae is closer to deserta and both are bigger than madeira (wing length - f:262, d: 264, m: 248; tarsus - f:34.7, d: 35.2, m: 32.7). Bill length once again similar in feae and deserta and both larger than madeira (f:29.0, d: 28.6, m: 26.3).
Text from Wikipedia, licensed CC BY-SA 4.0.
When to see the Desertas Petrel
One bar for each month. Filled bars are the 6 months with records; pale bars are months with none. The wide bar is June, the month with the most records.
About the Desertas Petrel
The Desertas petrel is a small seabird in the gadfly petrel genus which breeds on Bugio Island in the Desertas off Madeira.
Text adapted from Wikipedia, licensed CC BY-SA 4.0.
Easily confused with
Grey-faced PetrelPterodroma gouldiGrey-faced petrels are large birds, with a body length of 42–45 cm and weighing on average 550 grams (19 oz).
Chatham Islands PetrelPterodroma axillarisThe Chatham Islands petrel is a medium-sized petrel with a mottled dark-grey and white forehead, dark grey back and upper wings, and white underparts.
Henderson PetrelPterodroma atrataThe Henderson petrel is a ground-nesting species of gadfly petrel in the family Procellariidae.
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