• BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE!

    You are most welcome to register for an account, which allows you to take part in lively discussions in the forum, post your pictures in the gallery and more.

Little Shearwater - BirdForum Opus


Photo by robhynson
Lord Howe Island, August, 2013
Puffinus assimilis

Identification

25-30cm

  • Very dark upperparts
  • Pale area on upperside of secondaries, more so on worn birds
  • White underparts
  • Underwing very white with thinner black trailing edge than similar species
  • Wings shorter and rounder than similar species; does not reach tip of tail on resting bird

Photo by robhynson
Lord Howe Island, August, 2013
  • Body relatively longer than similar species
  • White cheeks extend up to sides of crown encircling dark eye (this is true for forms from Australia, but for example not for elegans that have black sides of head)
  • Rounded head
  • Dark peak reaching slightly down into the white underside behind head
  • Slim bill shorter than similar species
  • Legs and feet pale blue
  • In flight on a calm day may remind of a smaller Alcid.

Similar Species

Manx Shearwater, Audubon's Shearwater, Macaronesian Shearwater, and Townsend's Shearwater.

Distribution

Oceanic wanderers with breeding centres in the Southern Oceans around Australia and New Zealand.

Taxonomy

Clements[1], Gill and Donsker[2] and Dickinson[3] don't completely agree on the taxonomic treatment of this species.
The first two have split both Subantarctic Shearwater and Macaronesian Shearwater from this species (the latter split into Barolo Shearwater and Boyd's Shearwater). Dickinson however has followed Austin and others and has transferred baroli and boydi to Audubon's Shearwater. myrtae was also formerly included as subspecies in Little Shearwater but then transferred to Newell's Shearwater and later accepted as full species Rapa Shearwater.

Subspecies

5 subspecies recongized:[1]

  • P. a. tunneyi:
  • Islands off south-west Australia (Abrolhos Islands to Récherche Archaepelago)
  • P. a. assimilis:
  • Norfolk and Lord Howe islands
  • P. a. kermadecensis:
  • Kermadec Islands
  • P. a. haurakiensis:
  • Islets off north-east coast of North Island (New Zealand)

Habitat

Breeds on islands and coastal cliffs, otherwise pelagic.

Behaviour

Flight

Often holds head up. Quick wingbeats.

Breeding

Nests are made in burrows, in small colonies.

Diet

Diet includes fish and molluscs.

References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2019. The eBird/Clements Checklist of Birds of the World: v2019. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Gill, F, D Donsker, and P Rasmussen (Eds). 2020. IOC World Bird List (v 10.2). Doi 10.14344/IOC.ML.10.2. http://www.worldbirdnames.org/
  3. Dickinson, EC, ed. 2014. The Howard and Moore Complete Checklist of the Birds of the World. 4th ed. Princeton: Princeton Univ. Press. ISBN 978-0956861122
  4. Paper by Austin et al. (2004) describing phylogeny of small shearwaters
  5. Collins Bird Guide ISBN 0 00 219728 6
  6. Beaman, M., S. Madge, K.M. Olsen. 1998. Fuglene i Europa, Nordafrika og Mellemøsten. Copenhagen, Denmark: Gads Forlag, ISBN 87-12-02276-4
  7. Pizzey, G. & Knight, F. 1997. Birds of Australia (Collins Field Guide). HarperCollins Publishers, London. ISBN 0-00-220132-1
  8. Alvaro Jaramillo. 2003. Birds of Chile. Princeton Field Guides. ISBN 0-691-11740-3

Recommended Citation

External Links

Top