The Macquarie shag, Macquarie Island shag or Macquarie Island cormorant, is a marine cormorant native to Macquarie Island in the Southern Ocean, about halfway between Australia and Antarctica.
Region
Subantarctic Southern Ocean
Typical Environment
Occurs around Macquarie Island and adjacent islets, remaining close to the coast throughout the year. It frequents rocky shorelines, cliff bases, and nearshore kelp forests where it can exploit benthic prey. Breeding colonies are on sea cliffs, stacks, and rocky ledges exposed to strong winds and surf. Roosting and nesting sites are often reused annually and can be densely packed.
Altitude Range
Sea level to 150 m
Climate Zone
Polar
Ease of Keeping
Beginner friendly: 1/5
A blue-eyed shag restricted to the Macquarie Island region, it nests in dense colonies on sea cliffs and rocky headlands. It forages close to shore, using powerful pursuit-dives among kelp beds and reefs. Because its entire population is confined to a few sites, it is highly vulnerable to storms, prey shifts, and human disturbance. It is often considered an indicator of subantarctic marine ecosystem health.
Temperament
social and colonial
Flight Pattern
strong flier with rapid wingbeats, skimming low over waves
Social Behavior
Breeds in tight colonies on cliffs and rocky stacks, constructing nests of seaweed, grass, and guano. Pairs are largely monogamous within a season, with both sexes sharing incubation and chick-rearing. Chicks form small crèches near the nest sites while adults forage nearby.
Migratory Pattern
Resident
Song Description
Generally quiet at sea, but at colonies emits low croaks, grunts, and hisses during displays and territorial interactions. Vocalizations are harsh and guttural rather than musical, with chicks giving high-pitched begging calls.
