African Penguin

The African penguin (Spheniscus demersus), also known as the jackass penguin and black-footed penguin is a species of penguin, confined to southern African waters. It is also widely known as the "jackass" penguin for its donkey-like bray, although several related species of South American penguins produce the same sound. Like all extant penguins it is flightless, with a streamlined body, and wings stiffened and flattened into flippers for a marine habitat. Adults weigh on average 2.2–3.5 kg (4.9–7.7 lb) and are 60–70 cm (24–28 in) tall. It has distinctive pink patches of skin above the eyes and a black facial mask; the body upperparts are black and sharply delineated from the white underparts, which are spotted and marked with a black band. This pink gland above their eyes helps them to cope with changing temperatures. When the temperature gets hotter, the body of the African penguin sends more blood to these glands to be cooled by the air surrounding it. This then causes the gland to turn a darker shade of pink. The African penguin is a pursuit diver and feeds primarily on fish and squid. Once extremely numerous, the African penguin is declining due to a combination of threats and is classified as endangered. It is a charismatic species and is popular with tourists. The African penguin was one of the many bird species originally described by Linnaeus in the landmark 1758 10th edition of his Systema Naturae, where he grouped it with the wandering albatross on the basis of its bill and nostril morphology and gave it the name Diomedea demersa. The African penguin is a banded penguin, placed in the genus Spheniscus. The other banded penguins are the African penguin's closest relatives, and are all found mainly in the Southern Hemisphere: the Humboldt penguin and Magellanic penguins found in southern South America, and the Galápagos penguin found in the Pacific Ocean near the equator. All are similar in shape, colour and behaviour. The African penguin is a member of the class Aves, and the order Sphenisciformes. It belongs to the penguin family Spheniscidae. It is classified as Spheniscus demersus, which is somewhat descriptive about its behaviour when analysed with etymology. The genus to which the African penguin belongs to, Spheniscus, derives from the Ancient Greek word sphen, which means wedge. This refers to their streamlined body shape. Its species name, demersus, is a Latin word for "plunging". African penguins grow to 60–70 cm (24–28 in) tall and weigh between 2.2–3.5 kg (4.9–7.7 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. Juveniles do not possess the bold, delineated markings of the adult but instead have dark upperparts that vary from greyish-blue to brown; the pale underparts lack both spots and the band. The beak is more pointed than that of the Humboldt. Their distinctive black and white colouring is a vital form of camouflage called countershading– white for underwater predators looking upwards and black for predators looking down onto the dark water. African penguins look similar and are thought to be related to the Humboldt, Magellanic, and Galapagos penguins. African penguins have a very recognizable appearance with a thick band of black that is in the shape of an upside-down horseshoe. They have black feet and unique black spots that vary in size and shape per penguin. Magellanic penguins share a similar characteristic that often confuses the two, the similarity is a double bar on the throat and chest. These penguins have the nickname of "jackass penguin" which comes from the loud noises they make. The African penguin is only 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. Two colonies were established by penguins in the 1980s on the mainland near Cape Town, namely Boulders Beach near Simon's Town and Stony Point in Betty's Bay. Mainland colonies probably only became possible in recent times due to the reduction of predator numbers, although the Betty's Bay colony has been attacked by leopards. The only other mainland colony is in Namibia, but it is not known when it was established. Boulders Beach is a tourist attraction, for the beach, swimming and the penguins. The penguins will allow people to approach them as close as a metre. Breeding populations of African penguins are being kept in numerous zoos worldwide. No colonies are known outside the south-western coast of Africa, although vagrants (mostly juveniles) may occasionally be sighted beyond the normal range. Roughly 4 million penguins existed at the beginning of the 19th century. Of the 1.5-million population of African penguins estimated in 1910, only some 10% remained at the end of the 20th century. African penguin populations, which breed in Namibia and South Africa, have declined by 95 percent since pre-industrial times. The total population fell to 200,000 in 2000. In 2010, the number was estimated to be only at 55,000. If this decline is not halted, the African penguin is expected to be extinct within 15 years. 5,000 breeding pairs were estimated to live in Namibia in 2008; in 2012, about 18,700 pairs were estimated to live in South Africa, with the majority of those numbers on St Croix Island in Algoa Bay. African penguins forage in the open sea, where they pursue pelagic fish such as pilchards and anchovies (e.g. Engraulis capensis), and marine invertebrates such as squid and small crustaceans. Penguins normally swim within 20 km of the shore. A penguin may consume up to 540 grams of prey every day, but this may increase to over 1 kg when raising older chicks. Due to the collapse of a commercial pilchard fishery in 1960, African penguin diet has shifted towards anchovies to some extent, although available pilchard biomass is still a notable determinant of penguin population development and breeding success. While a diet of anchovy appears to be generally sufficient, it is not ideal due to lower concentrations of fat and protein. Penguin diet changes throughout the year; as in many seabirds, it is believed that the interaction of diet choice and breeding success helps the penguins maintain their population size. Although parent penguins are protective of their hatchlings, they will not incur nutritional deficits themselves if prey is scarce and hunting requires greater time or energy commitment. This may lead to higher rates of brood loss under poor food conditions. 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 crèche 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. African penguin females remain fertile for 10 years. African penguins spend most of their lives at sea until it comes time for them to lay their eggs. Due to the high predation by larger mammals on the mainland, the penguins will go offshore to an island for protection from mammals and natural challenges. African penguins usually breed during the African winter when temperatures are lower. Ideally, eggs are incubated in a burrow dug into the guano layer, which provides a suitable temperature regulation, but the widespread human removal of guano deposits has rendered this type of nest unfeasible at most colonies. To compensate, penguins dig holes in the sand, breed in the open, or make use of nest boxes if such are provided. The penguins spend three weeks on land to provide for their offspring, after which chicks may be left alone during the day while the parents forage. The eggs are three to four times bigger than hen’s eggs. Parents usually feed hatchlings during dusk or dawn. The average lifespan of an African penguin is 10 to 27 years in the wild, and can live up to 30 in captivity. However, the African penguin may often fall to predators. Predators in the ocean include sharks, Cape fur seals and, on occasion, orcas. Land-based enemies include mongooses, genets, caracals, domestic cats, and the kelp gull which steals their eggs and newborn chicks. Pressure from terrestrial predators is higher if penguins are forced to breed in the open in the absence of suitable burrows or nest boxes. There are many projects in place to protect the African penguin throughout South Africa, including the Baywatch Marine Conservation Project based in Port Elizabeth and the African Penguin & Seabird Sanctuary based in Gansbaai. The Baywatch Marine Conservation Project is the only permitted organization to conduct research on St Croix Island. BMCP are partly funded by Raggy Charters and were founded by Lloyd Edwards. In February 2015, the Dyer Island Conservation Trust opened the African Penguin and Seabird Sanctuary (APSS) in Gansbaai, South Africa. This seabird rehabilitation center is the only center in South Africa permitted by the Department of Environmental Affairs and CapeNature to handle and treat endangered species, including the African penguin. The center was opened by the Department of Tourism Minister Derek Hanekom and will serve as a hub for seabird research carried out by the Dyer Island Conservation Trust. The center will also run local education projects, host international marine volunteers, and seek to improve seabird handling techniques and rehabilitation protocols. Commercial fisheries have forced these penguins to search for prey farther off shore, as well as making them eat less nutritious prey, since their preferred prey has become scarce. Global climate change is also affecting these penguins' prey abundance. As recently as the mid-20th century, penguin eggs were considered a delicacy and were still being collected for sale. Unfortunately, the practice was to smash eggs found a few days prior to gathering, to ensure that only fresh ones were sold. This added to the drastic decline of the penguin population around the Cape coast, a decline which was hastened by the removal of guano from islands for use as fertiliser, eliminating the burrowing material used by penguins. Penguins remain susceptible to pollution of their habitat by petrochemicals from spills, shipwrecks and cleaning of tankers while at sea. Disaster struck on 23 June 2000, when the iron ore tanker MV Treasure sank between Robben Island and Dassen Island, South Africa. It released 1,300 tons of fuel oil, causing an unprecedented coastal bird crisis, oiling 19,000 adult penguins at the height of the best breeding season on record for this vulnerable species. The oiled birds were brought to an abandoned train repair warehouse in Cape Town to be cared for. An additional 19,500 un-oiled penguins were removed from Dassen Island and other areas before they became oiled, and were released about 800 kilometres east of Cape Town, near Port Elizabeth. This gave workers enough time to clean up the oiled waters and shores before the birds could complete their long swim home (which took the penguins between one and three weeks). Some of the penguins were named and radio-tracked as they swam back to their breeding grounds. Tens of thousands of volunteers helped with the rescue and rehabilitation process, which was overseen by IFAW (International Fund for Animal Welfare) and the South African Foundation for the Conservation of Coastal Birds (SANCCOB), and took more than three months to complete. This was the largest animal rescue event in history; more than 91% of the penguins were successfully rehabilitated and released - an amazing feat that could not have been accomplished without such a tremendous international response. Due to the positive outcome of African penguins being raised in captivity after tragedies, such as the Treasure oil spill, the species is considered a good "candidate for a captive-breeding programme which aims to release offspring into the wild"; however, worries about the spread of new strains of avian malaria is a major concerning factor in the situation. Bringing the birds inland led to the exposure of parasites and vector species such as mosquitoes, specifically avian malaria which has caused 27% of the rehabilitated penguins deaths annually. African penguin casualties were significant following the sinking of the MV Apollo Sea and subsequent oil slick in 1994. 10,000 penguins were collected and cleaned, of which less than half survived. The African penguin is one of the species to which the Agreement on the Conservation of African–Eurasian Migratory Waterbirds (AEWA) applies. In November 2013 the African penguin was listed as endangered on the IUCN Red List of Threatened Species. In September 2010 it was listed as endangered under the US Endangered Species Act. Many organisations such as SANCCOB, Dyer Island Conservation Trust, SAMREC and Raggy Charters with the Penguin Research Fund in Port Elizabeth are working to halt the decline of the African penguin. Measures include monitoring population trends, hand-rearing and releasing abandoned chicks, establishing artificial nests and proclaiming marine reserves in which fishing is prohibited. Some colonies (e.g. on Dyer Island) are suspected to be under heavy pressure from predation by Cape Fur Seals and may benefit from the culling of individual problem animals which has been found effective (although requiring a large amount of management effort) in trials. The African Penguin is a small to medium sized Penguin species that is found along the coast of South Africa and on a number of it's surrounding islands. The African Penguin is thought to be most closely related to the Humboldt and Magellanic Penguins found in southern South America, and the Galapagos Penguin found in the Pacific Ocean near the Equator. The African Penguin was named for the fact that it is the only species of Penguin that is found breeding on the African Coast, and it is believed to be one of the first Penguin species to be discovered by humans. The African Penguin is a fairly distinctive species of penguin with clean black and white markings and a sharply pointed black beak. The African Penguin also has black feet and a number of dot-like markings flecked across it's white chest which are said to be as unique to the individual Penguin as a Human finger print is, along with a narrow black band. The male African Penguin is generally slightly larger than their female counterparts but both are fairly similar in appearance. One of the African Penguin's most distinctive features is that they have pink glands above their eyes which help them to cope with the temperate climates. The hotter the African Penguin gets, the more blood is sent to these glands so it may be cooled by the surrounding air, which in turn, makes these glands more pink. The African Penguin is found on the south-western coast of Africa, living in 27 colonies on 24 islands between Namibia and Algoa Bay, near Port Elizabeth, South Africa, with the largest colony found on Dyer Island, near Kleinbaai. African Penguins are most densely distributed around the cold, nutrient rich waters of the Benguela Current where there is a plentiful supply of food. Although they spend much of their time at sea, African Penguins gather in nesting sites on rocky islands where they spend their days in sheltered burrows to avoid the hot sun. They are one of the only Penguin species to be found in non-freezing conditions and cope with this by burrowing, emerging at dusk and dawn, and using the pink glands above their eyes to cool the blood down. Like many other Penguin species, African Penguins are incredibly sociable birds, with adults forming pair bonds that last for life (as long as 10 years). African Penguins can often be seen grooming one another, which is not only practical for cleaning purposes, but also for removing parasites and even just rearranging feathers, constantly strengthening the social bond between the pair. Their courtship displays are often very noisy as the male and female Penguin call to each other using a series of donkey-like sounds. African Penguins are also known to submit to a spot of bathing only a few meters from the shore, which they are thought to do quite regularly to both clean and to cool themselves down in the heat. African Penguins begin to breed at the average age of four, when a male and female will pair up, and tend to breed together for the rest of their lives. The female African Penguin either digs herself a burrow or finds a dip beneath a rock or bush, in which she lays two eggs. The eggs are incubated by both parents for up to 40 days, when only one of the eggs will usually hatch. The African Penguin chicks are fed and kept warm by their parents constantly until they are a month old when they begin to be left on their own, forming crèches with other chicks for protection from predators. They tend to remain with their parents until they are between 3 and 5 months old, when they will leave the colony (this is dependant though on the supply and quality of food in the area). The chicks return to the colony after a couple of years to moult into their adult plumage. African Penguins generally live for between 10 and 15 years. The African Penguin is a carnivorous animal that, like all other Penguin species, survives on a diet that is only comprised of marine organisms. Shoaling fish including Anchovies, Sardines, Horse Mackerel and Round Herrings make up the bulk of the African Penguin's diet, along with the occasional Squid or Crustacean when normal food is in short supply. The streamlined body of the African Penguin allows it to move through the water like a rocket, capable of reaching a top speed of around 20 kph when hunting for food. African Penguins catch their prey by diving into the ocean depths for around 2 minutes at a time. Although they normally go to depths of around 30 meters, it is not uncommon for them to be found hunting more than 100 meters beneath the water's surface. The African Penguin's smaller size means that it has many predators both in the water and also on dry land. Their marine predators are primarily Sharks and Cape Fur Seals, but the biggest threat to them on land is not just to the adult Penguins, but more the vulnerable eggs and chicks. Kelp Gulls and Scared Ibises prey on them from the air and Mongooses, Snakes, and Leopards have been observed hunting them on ground. The African Penguin has also been severely affected by Human activity in their native regions, with populations thought to have taken a drastic decline, mainly due to the exploitation of their eggs for food when they were first discovered. They are also severely affected by the disruption of their natural habitats. Penguins have more feathers than any other bird, which act as a waterproof layer keeping their skin dry. African Penguins moult once a year which they do back in their colonies. The whole process lasts for about 20 days, in which time, the African Penguins cannot swim or eat, and can lose almost half of their body weight. African Penguins are known to spend long periods of time fishing out at sea, and depending on the area, can travel between 30 and 110 km in one trip. However, those African Penguins who have chicks to feed, will rarely go that far, catching food closer to the shore, and as quickly as possible. The African Penguin is also known as the Jackass penguin, due to the donkey-like call that they make during their courtship rituals. It is widely believed that African Penguins were one of the first Penguin species to come into contact with Humans, due to the fact that they are found on the temperate South African coast rather than in the heart of Antarctica. This however, does not seem to have worked to the bird's advantage as their eggs were stolen for food (slowing the rate of reproduction), and the guano used in nest building was harvested for fertiliser. Today, other threats face the African Penguin including competition for food from commercial fishing and oil pollution in the water. Only a small handful of nesting sites can be accessed by tourists, but the Penguin's nervous nature of people means that these areas have to be strictly monitored. Today, the African Penguin is considered to be a vulnerable animal and has been listed as being Endangered by the IUCN. It is thought that today's African Penguin population of around 70,000 breeding pairs, is less than 10% of the population that existed in 1900. By the 1950s, the African Penguin population had halved, and it had then halved again by 1980. There is an approximate 2% decline in the African Penguin population every year, mainly due to the Human consumption of their eggs, competition for food and habitat disruption.