Desertas petrel

Desertas petrel
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Procellariiformes
Family: Procellariidae
Genus: Pterodroma
Species:
P. deserta
Binomial name
Pterodroma deserta
Mathews, 1934
Synonyms
  • Pterodroma mollis deserta
  • Pterodroma feae deserta

The Desertas petrel (Pterodroma deserta) is a small seabird in the gadfly petrel genus which breeds on Bugio Island in the Desertas off Madeira.

Taxonomy

The gadfly petrels in the genus Pterodroma are seabirds of temperate and tropical oceans. Many are little-known, and their often similar appearance have caused the taxonomy of the group to be rather fluid.[2] Although the systematics on this species has not yet been definitively established, provisionally some authorities have split the Desertas petrel, separating the Desertas breeding birds from those in the Cape Verde archipelago,[3] while others consider it a subspecies of the Fea's petrel. The species is named after its breeding grounds, which are pronounced "Dez-ERT-ass".

Description

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:[4]

  • 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).
  • Bill depth by far biggest in deserta, lowest in madeira, and intermediate in feae (f:11.9, d: 12.9, m: 10.5).

In terms of ratios:

  • (Bill length/wing length) (f:11.1%, d: 10.8%, m: 10.6%) is rather similar in the three taxa.
  • (Bill length/bill depth) (f: 2.44, d: 2.22, m: 2.53) is lowest in deserta, and highest in madeira. In feae it is intermediate, but more than twice closer to madeira than to deserta.

Behavior

A 2024 study by the Woods Hole Oceanographic Institute found that unlike many other seabird species, which tend to flee from hurricanes, the Desertas petrel follows the paths of hurricanes to feed on fish and squid brought to the surface by the increased ocean mixing.[5][6][7]

References

  1. ^ BirdLife International (2018). "Pterodroma deserta". IUCN Red List of Threatened Species. 2018: e.T22736135A132665941. doi:10.2305/IUCN.UK.2018-2.RLTS.T22736135A132665941.en. Retrieved 10 October 2024.
  2. ^ Onley, Derek; Scofield, Paul (2007). Albatrosses, Petrels and Shearwaters of the World (Helm Field Guides). London: Christopher Helm. p. 17. ISBN 978-0-7136-4332-9.
  3. ^ Shirihai, Hadoram; Bretagnolle, Vincent; Zino, Francis. "Identification of Fea's, Desertas and Zino's Petrels at sea". Birding World. 23 (6): 239–275.
  4. ^ Bretagnolle, Vincent (1995). "Systematics of the soft-plumaged petrel Pterodroma mollis (Procellariidae): new insight from the study of vocalizations". Ibis. 137 (2): 207–218. doi:10.1111/j.1474-919X.1995.tb03241.x.
  5. ^ Melnick, Kyle (2024-07-17). "Most birds avoid hurricanes. This species chases them, scientists say". Washington Post. ISSN 0190-8286. Retrieved 2024-07-17.
  6. ^ "Groundbreaking Study Reveals Oceanic Seabirds Chase Tropical Cyclones". Woods Hole Oceanographic Institute. Retrieved 2024-07-17.
  7. ^ Ventura, Francesco; Sander, Neele; Catry, Paulo; Wakefield, Ewan; De Pascalis, Federico; Richardson, Philip L.; Granadeiro, José Pedro; Silva, Mónica C.; Ummenhofer, Caroline C. (2024). "Oceanic seabirds chase tropical cyclones". Current Biology. 34 (14): 3279–3285.e3. doi:10.1016/j.cub.2024.06.022. ISSN 0960-9822.