Africa Wild Bird Book

Discussions and information on all Southern African Birds
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Dewi
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Grey-headed Albatross

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013. Grey-headed Albatross Thalassarche chrysostoma (Gryskiopalbatros)
Order: Procellariiformes. Family: Diomedeidae

Image
Adult

Description
Size 81 cm. Wingspan 210 cm. Medium-sized albatross with a grey head and neck, black bill, dark grey back and tail and a white breast. Adults have narrow yellow ridge to top of bill with red tip and yellow ridge along base. Head all grey with white crescent behind the eye. Underwing similar to Black-browed Albatross, white with broad black leading edge and narrow black trailing edge.
Juveniles are dark billed with grey heads and collar (more so than in Black-browed Albatross). Underwing all dark, becoming lighter with age.

Distribution
Circumpolar in Southern Oceans. Rare off South African coast, with most records being of Juveniles.
The Grey-headed albatross breeds on sub-Antarctic islands. The main populations are in the South Atlantic Sector of the Southern Ocean. Found in colder waters during the summer, this species moves northward into the subtropics during the southern winter. These birds have been recorded to circumnavigate the globe, sometimes twice, when they are not breeding.

Habitat
Breeding takes place on rocky shores or cliffs, ususally in areas of tussock grass. Otherwise found over the open ocean far from shore, often travelling vast distances.

Diet
It feeds while on the sea surface and undertakes long feeding trips, travelling up to 13,000 km on a single feeding flight. The diet consists of fish, squid and crustaceans.

Breeding
Grey-headed Albatrosses normally breed every two years. The nest is made of a cone of mud lined with grasses and all albatrosses lay only one egg. The egg is laid in mid-October and hatches during December. The male performs almost all of the incubation, which he carries out for the first 70 days. The chick takes three to four days to chip out of the egg and is then guarded for approximately three weeks. Most young depart from their natal nest the following May.

Status
Rare winter visitor. This species is classified as Vulnerable.


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Dewi
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Grey-headed Albatross Photos

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013. Grey-headed Albatross Thalassarche chrysostoma (Gryskiopalbatros)
Order: Procellariiformes. Family: Diomedeidae

Immature
Image

Grey Headed Albatross at sea.
Image

Returning to the breeding colony.
Image

Image

Image

They breed on craggy, tussac strewn ledges.
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One of the most stunning looking of all the Albatross species.
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Returning birds display to attract a mate with head bows.
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Nests are built of mud into a small tower above the damp ground.
Image

Grey Head pair at nest.
Image

Adult incubating single egg.
Image

Links:
Sasol
NEWMAN'S VOELS VAN SA (8ste UIT)
Trevor Hardaker Photos


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Dewi
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Black-browed Albatross

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012. Black-browed Albatross Thalassarche melanophris (Swarthugalbatros)
Order: Procellariiformes. Family: Diomedeidae

Image
Adult

Description
A medium sized Albatross. 81-95 cm. Wingspan 225 cm. It has a dark grey saddle and upperwings that contrast with the white rump, and underparts. The underwing is predominantly white with a broad black band on the leading edge and a narrow black band on the trailing edge. It has a dark eyebrow and a yellow-orange bill with a darker reddish-orange tip during the breeding season. The sexes appear similar.
Juveniles are darker on the underwing than adults, which whitens with age. The bill is dark, lightens yellower with age with a black tip. Juveniles have varying amounts of grey on hindneck and head.

Distribution
The Black-browed Albatross is the most widespread and common member of the Albatross family. Breeds on sub-Antarctic islands, dispersing across the southern Oceans, including in southern African waters. Here it is common off the west and south coast, while more scarce off northern Namibia and KwaZulu-Natal North.

Movements and migrations
Most birds in southern African waters originate from South Georgia, to a much lesser extent the Falkland and Kerguelen Islands. After breeding it rapidly migrates across the South Atlantic Ocean to the Western Cape.

Diet
It feeds on fish, squid, crustaceans, carrion and fishery discards.

Breeding
This species normally nests on steep slopes covered with tussock grass and sometimes on cliffs. In the Falklands it nests on flat grassland on the coast. They are annual breeders, laying one egg, between September 20 and November 1. Incubation is done by both sexes and last 68 to 71 days. After hatching, the chicks take 120 to 130 days to fledge. Juveniles will return to the colony after two to three years but only to practice courtship rituals, as they will start breeding around the 10th year.

Call
Groans and croaks at food sources.
Listen to Bird Call.

Status
Common summer visitor; all year in southern offshore waters. This species is listed as Endangered.


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Dewi
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Black-browed Albatross Photos

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012. Black-browed Albatross Thalassarche melanophris (Swarthugalbatros)

Image
Adult

Image © Michele Nel
Adult

Image © Michele Nel

Image
Immature

Image © Michele Nel
Immature

Links:
Species text Sabap1: http://sabap2.adu.org.za/docs/sabap1/012.pdf]
Sabap2: http://sabap2.adu.org.za/spp_summary.ph ... &section=3
Oiseaux net: http://www.oiseaux.net/birds/black-brow ... tross.html
Sasol
NEWMAN'S VOELS VAN SA (8ste UIT)
More photos by Dewi: https://africawild-forum.com/viewtopic.p ... t=50#p3612


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Toko
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Family Procellariidae (Petrels, Shearwaters)

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ORDER PROCELLARIIFORMES Family Procellariidae (Petrels, Shearwaters)
The family Procellariidae is a group of seabirds that comprises the fulmarine petrels, the gadfly petrels, the prions, and the shearwaters. This family is part of the bird order Procellariiformes (or tubenoses), which also includes the albatrosses, the storm-petrels, and the diving petrels.
The procellariids are the most numerous family of tubenoses, and the most diverse. They range in size from the giant petrels, which are almost as large as the albatrosses, to the prions, which are as small as the larger storm-petrels. They feed on fish, squid and crustacea, with many also taking fisheries discards and carrion. All species are accomplished long-distance foragers, and many undertake long trans-equatorial migrations. They are colonial breeders, exhibiting long-term mate fidelity and site philopatry. In all species, each pair lays a single egg per breeding season. Their incubation times and chick-rearing periods are exceptionally long compared to other birds.
Many procellariids have breeding populations of over several million pairs; others number fewer than 200 birds. Humans have traditionally exploited several species of fulmar and shearwater (known as muttonbirds) for food, fuel, and bait, a practice that continues in a controlled fashion today. Several species are threatened by introduced species attacking adults and chicks in breeding colonies and by long-line fisheries.
The procellariids are small- to medium-sized seabirds. The largest, the giant petrels with a wingspan of 81 to 99 cm, are almost as large as albatrosses; the smallest, such as the Fairy Prion have a wingspan of 23 to 28 cm, are slightly bigger than the diving petrels. There are no obvious differences between the sexes, although females tend to be slighter. Like all Procellariiformes, the procellariids have a characteristic tubular nasal passage which is used for olfaction. This ability to smell helps to locate patchily distributed prey at sea and may also help locate nesting colonies. The plumage of the procellariids is usually dull, with greys, blues, blacks and browns being the usual colours, although some species have striking patterns (such as the Cape Petrel).


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Toko
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Family Procellariidae (Petrels, Shearwaters) Index

Post by Toko »

Species indigenous to southern Africa:

Family Procellariidae (Petrels, Shearwaters)
Fulmarine Petrels
Macronectes giganteus Southern Giant Petrel 017
Macronectes halli Northern Giant Petrel 018
Fulmarus glacialoides Southern Fulmar 019
Thalassoica antarctica Antarctic Petrel 020
Daption capense Pintado Petrel 021
Prions: Genera Pachyptila and Halobaena
Halobaena caerulea Blue Petrel 028
Pachyptila belcheri Slender-billed Prion 030
Pachyptila crassirostris Fulmar Prion
Pachyptila desolata Antarctic Prion 020
Pachyptila salvini Salvin's Prion
Pachyptila turtur Fairy Prion 031
Pachyptila vittata Broad-billed Prion 029
Gadfly Petrels
Aphrodroma brevirostris Kerguelen Petrel 027
Pterodroma baraui Barau's Petrel
Pterodroma incerta Atlantic Petrel 026
Pterodroma lessonii White-headed Petrel 025
Pterodroma macroptera Great-winged Petrel 023
Pterodroma mollis Soft-plumaged Petrel 024
Shearwaters: Genera Calonectris, Puffinus, Pseudobulweria, Procellaria, Bulweria
Procellaria aequinoctialis White-chinned Petrel 032
Procellaria cinerea Grey Petrel 033
Procellaria conspicillata Spectacled Petrel
Calonectris diomedea Cory's Shearwater 034
Calonectris leucomelas Streaked Shearwater
Puffinus bailloni Tropical Shearwater 040
Puffinus assimilis Little Shearwater 039
Puffinus carneipes Flesh-footed Shearwater 036
Puffinus gravis Great Shearwater 035
Puffinus griseus Sooty Shearwater 037
Puffinus mauretanicus Balearic Shearwater
Puffinus pacificus Wedge-tailed Shearwater 041
Puffinus puffinus Manx Shearwater 038
Bulweria bulwerii Bulwer's Petrel 022
Bulweria fallax Jouanin's Petrel


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Dewi
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Southern Giant Petrel

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017. Southern Giant-petrel Macronectes giganteus (Reusenellie)
Order: Procellariiformes. Family: Procellariidae

Image
White phase

Description
A large seabird with varying colour morphs ranging from dark through to all white. Typically greyish brown with pale head and a paler belly. All age groups have a large yellowish bill with a green tip, capable of opening intact carcasses. This species has an all-white phase which is unknown in the Northem Giant Petrel, otherwise these two species are very similar and can only be identified with certainty at close range.
Juveniles are sooty-black in colour.
Best seperated from Northern Giant-petrel by apple green tip to the pale horn bill. Note that Northern does not have the white morph.

Distribution
Southern Oceans. Breeds on sub-Antarctic islands, ice-free areas of Antarctica, the Patagonian coast and the Falkland Islands, after which it disperse across the southern oceans, mainly between 30-70° South although extending further north along the west coasts of South America and southern Africa. Here it is fairly common off South Africa and Namibia, while more scarce to the east of southern Mozambique and the north-western corner of the region.

Habitat
Pelagic.

Movements and migrations
Occurs year-round off the southern African coast, although most common in winter, as it returns to its breeding colonies from July onwards.

Diet
It is an omnivorous scavenger and predator.

Breeding
Does not breed in the sub-region. The breeding colonies are found from the sub-Antarctic islands south to the Antarctic continent.
Its breeding season begins in October. Its nest is a mound of moss, grass, and stones with a depression in the center and located on bare or grassy ground. They form loose colonies except in the Falkland Islands where the colonies are much larger. One egg is laid and is incubated for 55–66 days. When the white chick is born it is brooded for two to three weeks and it fledges at 104–132 days.

Call
Harsh grunts and screams. Listen to Bird Call.

Status
Common all-year visitor to the coasts. Classified as Least Concern (LC) on the IUCN Red List.


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Southern Giant-petrel Photos

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017. Southern Giant-petrel Macronectes giganteus (Reusenellie)

Juvenile
Image

Grey/intermediate phase
Image

Image

Northern Giant-petrel at rear, Southern Giant-petrel in front - note aggression display
Image

Links:
Species text Sabap1: http://sabap2.adu.org.za/docs/sabap1/018.pdf
Sasol
NEWMAN'S VOELS VAN SA (8ste UIT)
ARKive: http://www.arkive.org/southern-giant-pe ... giganteus/
More photos by Dewi: https://africawild-forum.com/viewtopic.p ... t=40#p3598


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Northern Giant Petrel

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018. Northern Giant-petrel Macronectes halli (Grootnellie)
Order: Procellariiformes. Family: Procellariidae

Dark and light phase
Image

Description
Length: 80-95 cm. Wingspan: 150-210 cm. Male weight: 5 kg. Female weight: 3.8 kg.
Adults have a largely grey-brown body, with an off-whitish head, neck and breast. Bill pale pinkish-yellow horn tipped brownish.
The male is conspicuously larger and heavier-billed than the female.
The juvenile is completely dark brown and lightens as it ages.
Very similar to Southern Giant-Petrel, but does not have white phase and has a red-brown tip to the bill, which on the Southern Giant-petrel is green.

Distribution
Southern Oceans. The Northern Giant-petrel has a circumpolar distribution in open oceans, mostly between 30 and 64°south. Breeds on sub-Antarctic islands, after which it disperses across the southern oceans, including southern African waters. Here it is fairly common off the southern and western coast, while more scarce in the north-western corner of the region and off the coast of southern Mozambique.

Habitat
Pelagic.

Movements and migrations
Present year-round in southern Africa, but generally most abundant in winter, as most birds return to their breeding colonies in August.

Diet
Carrion. Northern Giant-Petrel feeds mainly on seals and penguins carcasses at sea or on land, dead penguins and also discarded fish and refuse from ships. Female feeds mainly on live preys caught at sea, such as krill and aquatic invertebrates.

Breeding
The Northern Giant-petrel breeds on islands, from South Georgia, across South Indian Ocean to New Zealand surroundings. The breeding season generally begins towards the end of the Austral winter, with pairs establishing a nest site in August and laying a single egg between August and October. The small, loose breeding colonies generally comprise less than 50 pairs, with the untidy nests dispersed widely amongst tussock grass and rocky out-crops. The eggs are incubated for around 60 days, and the chicks fledge around 108 days after hatching

Call
Harsh grunts and screams, slightly higher pitched than Southern Giant-petrel. Listen to Bird Call.

Status
Common all-year visitor to the coasts. The Northern Giant-petrel is classified as Least Concern (LC) on the IUCN Red List.


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Dewi
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Northern Giant-petrel Photos

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