2018 Concert coming up soon

Date posted: 15-Feb-2018

Our 2018 concert will feature an afternoon of light classics and jazz courtesy of the Auckland Ph..

Wetapunga talk coming soon

Date posted: 05-Feb-2018

For the Social on 19 March the speaker will be Ben Goodwin of Auckland Zoo, who will talk about t..

Rat caught and now takahe released from pens

Date posted: 28-Jan-2018

Thankfully DOC staff Andre de Graaf and Polly Hall and their assistants have trapped the rat whic..

Your Christmas Shopping for a Song

Date posted: 04-Dec-2017

Aka - The Grand Christmas Shopping Expedition to Tiritiri Matangi Island Shop Dreading..

2018 Photo Comp opens for entries

Date posted: 27-Nov-2017

The 2018 Photo Competition is now open for entries. Click here (/2018-photo-competition-tiritiri-mat..

New reports on ruru nesting and Island conservation

Date posted: 02-Oct-2017

Two new reports have been added to the website. The first gives details of a summer students..

2018 calendars now available

Date posted: 27-Sep-2017

Our latest calendar, beautifully illustrated with images taken on the Island, is now available fo..

Guided walks for photographers

Date posted: 21-Jun-2017

For a wonderful day of wildlife photography please join us on Tiritiri Matangi Island for a Ph..

Ferry discounts for Supporters

Date posted: 18-May-2017

Tiritiri Matangi Island, the perfect winter's day trip. The birds are at their best, warm up w..

More kiwi for the Island

Date posted: 04-Apr-2017

In 1993 and 1995, sixteen little spotted kiwi were released on Tiritiri Matangi Island. The ma..

Black Shag

Scientific name:

 Phalacrocorax carbo 

Maori name:

 Kawau

 

 

Conservation status

Naturally uncommon

Mainland status:

Sparsely widespread 

Size:

88 cm, 2.2 kg

Lifespan:

Up to 20 years (record from Europe) 

Breeding:

Timing variable according to area   

Diet:

Fish, crayfish, large invertebrates, molluscs 

Total population:

Estimated at 5,000-10,000 individuals (2012) 

The black shag is widely distributed throughout the world. The sub-species that breeds in New Zealand (novaehollandiae) is also found throughout Australia and New Guinea. 

It is our largest shag, and is sparsely distributed throughout the country. Black shags feed on small-medium fish in both fresh and marine water; they also eat crustaceans and molluscs. Because of their preference for fish, they have in the past been persecuted by fishermen, though this happens less often nowadays.

They breed in colonies, usually in trees overhanging or close to water, inland or at the coast. They build a large nest of twigs and lay 2-5 eggs, usually three, in autumn or winter, though timing is highly variable; they have been found nesting at all times of the year. Incubation lasts 27-31 days and chicks fledge at around seven weeks old. Most start to breed when they are three years old.

Black shags can turn up anywhere around the coast or on inland waters and are seen occasionally in the vicinity of Tiritiri Matangi, though they do not breed on the Island.

Find out more about the black shag at New Zealand Birds Online.

Photograph by Simon Fordham ©

Reference: Heather, B and Robertson, H. The Field Guide to the Birds of New Zealand, Viking 2005.