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Description
The Black-browed Albatross is one of the smallest of the
13 species of albatross. It is 80-95 cm in length with a
wingspan of 210-250 cm, weighing 3-5 kg. It is mostly
white with yellowish - orange webbed feet, grey
highlights, black patches on the underwings and has a red
tipped, yellow beak. Conspicuous black 'eye brows' give
the bird its name. The fledglings have dark underwings
and grey-green bills with dark tips. They change to the
adult colouration after about 3 to 5 years. These are
long lived birds, living 30 years or more, and they have
a strong bond to their colony of birth.
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Breeding
Timing of breeding
varies with location. Generally the breeding season
extends from September to April. They breed and nest on
slopes and cliffs that are close to the sea and use the
same nest year after year. Territories between nests are
well defined and they keep their nests a regular distance
apart (1.55 metres). They arrive to breed in
mid-September to early October and eggs appear in early
to mid-October. The eggs hatch in December and the young
fledge between April and June.
Distribution
Black-browed
Albatross are the most widely distributed of all
albatross species.They are found over Antarctic,
Sub-Antarctic and sub-tropical waters. They are most
numerous in the Falkland Islands with 90% of the global
population located there. They breed in the Sub-Antarctic
and Antarctic islands between 46o and 56oS. Nearest breeding site to
Australia is at Macquarie Island and they also breed on
Staten Island and others near Caoe Horn ; at Falkalands,
South Georgia, Prince Edward, Kerguelen, Aukland,
Antipodes and Campbell Islands.
Diet
They eat mostly
krill and fish. Birds may travel long distances for food
- sometimes over water for several days and hundreds of
kilometres.
General Information
In flight the
Black-browed Albatross flies fairly low and takes food
from the sea surface or just below - occasionally
plunging from heights of up to 9 metres. It flaps its
wings more than its larger cousin the Wandering Albatross
and flies in groups of 30 or more.
Population
Status
Their
population status varies with respect to location of
colony. Current population is approximately 682,000
breeding pairs with an estimated 3 million birds in
total.
Conservation Status and Threats
The Black-browed
Albatross is listed as endangered.
Due to their
feeding habits, the most significant threat to these and
many other albatross is long line fishing. Distribution of Black-browed Albatross
populations coincide with long line fishing grounds and
it is estimated that tuna fishing boats kill up to 1000
of these graceful birds each day in waters south of
Australia. Australasian longlining represents the major
threat to Indian Ocean and Australasian populations.
Longlining off Africa threatens the South Georgia
population and longlining off South America threatens the
Falkland and Chilean populations.
The Black-browed
Albatross is facing a very high risk of extinction in the
wild in the near future. A reduction of at least 50% is
projected or suspected to be met within the next 10
years.
A protective
agreement was signed in South Africa in February 2001.
The agreement creates conservation rules that countries
who fish the Southern Ocean will be encouraged to adopt.
Under the most significant measure in the new
regulations, tuna operators must set their long lines at
night in waters south of latitude 30oS. This is the main area of
concern, as sea birds are less active after dark. Other
measures introduced by the regulations require all tuna
long-line vessels to carry a "tori pole" device
to scare sea birds and make their use mandatory south of 30o
latitude. There will also be
requirements for tuna operators in southern waters to
thaw baits so they sink more quickly, and guidelines on
the appropriate discharge of offal.
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Focus" pages.
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