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| + | [[Image:Attachment.jpg|thumb|550px|right|Adult<br />Photo © by {{user|MariettaBirder |MariettaBirder }} <br />Enderby Island, [[New Zealand]], 8 January 2007]] | ||
'''Alternative name: Auckland Islands Shag''' | '''Alternative name: Auckland Islands Shag''' | ||
| − | + | ;[[:Category:Leucocarbo|Leucocarbo]] colensoi | |
| − | + | ''Phalacrocorax colensoi'' | |
| − | ;[[:Category: | ||
==Identification== | ==Identification== | ||
| − | 63 cm (24¾ in) | + | Length: 63 cm (24¾ in)<br /> |
| + | '''Adult''' | ||
*Black upperparts with a metallic blue sheen | *Black upperparts with a metallic blue sheen | ||
*White underparts and throat | *White underparts and throat | ||
| Line 11: | Line 12: | ||
*Some males have a white patch on the back | *Some males have a white patch on the back | ||
*Short black crest | *Short black crest | ||
| − | [[Image:Colony.jpg|thumb| | + | '''Juvenile'''<br /> |
| + | *Similar to adult but black areas brownish. | ||
| + | [[Image:Colony.jpg|thumb|350px|right|Colony<br />Photo © by {{user|MariettaBirder |MariettaBirder }} <br />Enderby Island, [[New Zealand]], 8 January 2007]] | ||
| + | ====Similar Species==== | ||
| + | These are the only shags on the Auckland Islands. Very similar to the [[Campbell Island Shag]], the Auckland Island Shag has a variable neck pattern with the black sometimes meeting across the foreneck, sometimes mottled and sometimes completely separated by white. | ||
==Distribution== | ==Distribution== | ||
| − | [[New Zealand]] | + | Restricted to the Auckland Islands and surrounding waters, [[New Zealand]], with colonies present on Auckland, Enderby, Rose, Ewing and Adams Islands. |
| − | |||
==Taxonomy== | ==Taxonomy== | ||
This is a [[Dictionary_M-S#M|monotypic]] species<sup>[[#References|[1]]]</sup>. | This is a [[Dictionary_M-S#M|monotypic]] species<sup>[[#References|[1]]]</sup>. | ||
| − | This taxon is considered a subspecies of [[New Zealand King Shag]] (sensu lato) by some authors<sup>[[#References|[ | + | This taxon is considered a subspecies of [[New Zealand King Shag]] (''sensu lato'') and is lumped with the [[Campbell Island Shag]]and [[Bounty Islands Shag]] by by some authors<sup>[[#References|[6]]]</sup><br /> |
| − | Sometimes placed in genus [[:Category: | + | Sometimes placed in genus [[:Category:Phalacrocorax|Phalacrocorax]]. |
| + | |||
==Habitat== | ==Habitat== | ||
| − | Open sea and sheltered coastal waters. Breeds on rocky cliffs. | + | Open sea and sheltered coastal waters. Breeds and roosts on rocky cliffs. |
==Behaviour== | ==Behaviour== | ||
| + | [[Image:Juvenile.jpg|thumb|350px|right|Juvenile<br />Photo © by {{user|MariettaBirder |MariettaBirder}} <br />Enderby Island, [[New Zealand]], 8 January 2007]] | ||
====Breeding==== | ====Breeding==== | ||
| − | + | They nests in colonies on ledges, the tops of sea cliffs, in hollows, and also sometimes on flat ground among grass tussock or in the shelter of overhanging rocks, bushes or trees. Females usually lay a clutch of three eggs between November and February, followed by an incubation period of around 28 to 32 days. However, a brood of only two chicks is normally successfully raised. | |
| − | They | ||
====Diet==== | ====Diet==== | ||
The diet includes small fish and marine invertebrates. | The diet includes small fish and marine invertebrates. | ||
| − | + | ====Vocalisations==== | |
| + | Male advertises with rough barking ''borr'' or ''orr-orrgh'' and threatens with ''erh-erh-erh.'' Also male makes ticking sounds, while the female gives a soft purr. | ||
==References== | ==References== | ||
| − | #{{Ref- | + | #{{Ref-Clements6thAug18}}#Marchant, S. & Higgins, P.J. (coordinating editors) 1990. Handbook of Australian, New Zealand & Antarctic Birds. Volume 1, Ratites to ducks. Melbourne, Oxford University Press. |
| − | #ArKive | + | #Orta, J., Christie, D.A., Jutglar, F. & Kirwan, G.M. (2017). Auckland Shag (''Phalacrocorax colensoi''). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from http://www.hbw.com/node/52646 on 27 February 2017). |
| − | # | + | #Shirihai, H. (2007) A Complete Guide to Antarctic Wildlife. The Birds and Marine Mammals of the Antarctic Continent and the Southern Ocean. 2nd edition. A&C Black, London. |
| + | #Szabo, M.J. 2013 [updated 2015]. Auckland Islands shag. In Miskelly, C.M. (ed.) New Zealand Birds Online. http;//www.nzbirdsonline.org.nz | ||
| + | #[https://avibase.bsc-eoc.org/avibase.jsp Avibase] | ||
| + | #[https://www.arkive.org/auckland-islands-shag/phalacrocorax-colensoi/ ArKive] | ||
| + | #BirdForum Member observations | ||
{{ref}} | {{ref}} | ||
| + | |||
==External Links== | ==External Links== | ||
| − | {{GSearch| | + | {{GSearch|Shag+colensoi}} |
| − | [[Category:Birds]] [[Category: | + | [[Category:Birds]] [[Category:Leucocarbo]] |
| + | |||
| + | {{GS-checked}} | ||
| + | <br /> | ||
| + | <br /> | ||
Latest revision as of 07:26, 28 April 2022
Alternative name: Auckland Islands Shag
- Leucocarbo colensoi
Phalacrocorax colensoi
Identification
Length: 63 cm (24¾ in)
Adult
- Black upperparts with a metallic blue sheen
- White underparts and throat
- Pink legs and feet,
- White wing bar
- Some males have a white patch on the back
- Short black crest
Juvenile
- Similar to adult but black areas brownish.
Similar Species
These are the only shags on the Auckland Islands. Very similar to the Campbell Island Shag, the Auckland Island Shag has a variable neck pattern with the black sometimes meeting across the foreneck, sometimes mottled and sometimes completely separated by white.
Distribution
Restricted to the Auckland Islands and surrounding waters, New Zealand, with colonies present on Auckland, Enderby, Rose, Ewing and Adams Islands.
Taxonomy
This is a monotypic species[1].
This taxon is considered a subspecies of New Zealand King Shag (sensu lato) and is lumped with the Campbell Island Shagand Bounty Islands Shag by by some authors[6]
Sometimes placed in genus Phalacrocorax.
Habitat
Open sea and sheltered coastal waters. Breeds and roosts on rocky cliffs.
Behaviour
Breeding
They nests in colonies on ledges, the tops of sea cliffs, in hollows, and also sometimes on flat ground among grass tussock or in the shelter of overhanging rocks, bushes or trees. Females usually lay a clutch of three eggs between November and February, followed by an incubation period of around 28 to 32 days. However, a brood of only two chicks is normally successfully raised.
Diet
The diet includes small fish and marine invertebrates.
Vocalisations
Male advertises with rough barking borr or orr-orrgh and threatens with erh-erh-erh. Also male makes ticking sounds, while the female gives a soft purr.
References
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2018. The eBird/Clements checklist of birds of the world: v2018. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- Marchant, S. & Higgins, P.J. (coordinating editors) 1990. Handbook of Australian, New Zealand & Antarctic Birds. Volume 1, Ratites to ducks. Melbourne, Oxford University Press.
- Orta, J., Christie, D.A., Jutglar, F. & Kirwan, G.M. (2017). Auckland Shag (Phalacrocorax colensoi). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from http://www.hbw.com/node/52646 on 27 February 2017).
- Shirihai, H. (2007) A Complete Guide to Antarctic Wildlife. The Birds and Marine Mammals of the Antarctic Continent and the Southern Ocean. 2nd edition. A&C Black, London.
- Szabo, M.J. 2013 [updated 2015]. Auckland Islands shag. In Miskelly, C.M. (ed.) New Zealand Birds Online. http;//www.nzbirdsonline.org.nz
- Avibase
- ArKive
- BirdForum Member observations
Recommended Citation
- BirdForum Opus contributors. (2024) Auckland Shag. In: BirdForum, the forum for wild birds and birding. Retrieved 3 May 2024 from https://www.birdforum.net/opus/Auckland_Shag
External Links
GSearch checked for 2020 platform.
