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Description
The African Penguin (Spheniscus demersus), also known as the Black-footed
Penguin is a species of penguin confined to southern African waters.
It is known as Brilpikkewyn in Afrikaans, Inguza or Unombombiya
in Xhosa, Manchot Du Cap in French and Pingüino Del Cabo
in Spanish. It is also widely known as the "Jackass"
Penguin for its donkey-like bray, although several species of
South American penguins produce the same sound. African Penguins
grow to 68–70 cm (26.7–27.5 in) tall and weigh between
2 and 5 kg (4.4 and 11 lb). They have a black stripe and black
spots on the chest, the pattern of spots being unique for every
penguin, like human fingerprints. They have pink glands above
their eyes, which are used for thermoregulation. The hotter the
penguin gets, the more blood is sent to these glands so it may
be cooled by the surrounding air, thus making the glands more
pink.This species exhibits slight sexual dimorphism: the males
are larger than the females and have larger beaks. The beak is
more pointed than that of the Humboldt. Their distinctive black
and white colouring is a vital form of camouflage– white
for underwater predators looking upwards and black for predators
looking down onto the dark water. This is called countershading.
Habitat
The African Penguin is found on the south-western coast of Africa,
living in colonies on 24 islands between Namibia and Algoa Bay,
near Port Elizabeth, South Africa. It is the only penguin species
that breeds in Africa and its presence gave name to the Penguin
Islands.
Breeding
The African Penguin is monogamous. It breeds in colonies, and
pairs return to the same site each year. The African Penguin has
an extended breeding season, with nesting usually peaking from
March to May in South Africa, and November and December in Namibia.
A clutch of two eggs are laid either in burrows dug in guano,
or scrapes in the sand under boulders or bushes. Incubation is
undertaken equally by both parents for about 40 days. At least
one parent guards the chicks until about 30 days, whereafter the
chick joins a creche with other chicks, and both parents head
out to sea to forage each day. Chicks fledge at 60 to 130 days,
the timing depending on environmental factors such as quality
and availability of food. The fledged chick then go to sea on
their own and return to their natal colony after a lengthy time
period of 12-22 months to molt into adult plumage. When penguins
molt, they are unable to forage as their new feathers are not
waterproof yet; therefore they fast over the entire molting period,
which in African Penguins takes about 20 days.
Diet
African Penguins forage in the open sea, where they pursue pelagic
fish such as pilchards and anchovies and marine invertebrates
such as squid and small crustaceans. A penguin may consume up
to 540 grams of prey every day, but this may increase to over
1 kg when raising older chicks.
Threats
African Penguins forage in the open sea, where they pursue pelagic
fish such as pilchards and anchovies and marine invertebrates
such as squid and small crustaceans. A penguin may consume up
to 540 grams of prey every day, but this may increase to over
1kg when raising older chicks. |