African Penguin
Re: African Penguin - Bird of the Month April 2015
Thanks all! nan, the next entry will pertain to your fancily attired penquin with its "mink stole".nan wrote:I post a second time this one......
please be carefull with my "pachmina"
Re: African Penguin - Bird of the Month April 2015
Life Cycle
African penguins usually produce one to two eggs per clutch and incubation lasts 38–41 days. Responsibility to incubate the eggs is shared equally between both sexes. When one parent is incubating the egg, the other will head out to sea to forage or head out to collect vegetative nesting material. Each parent has an incubation ‘pouch’ located on the body to keep the incubation temperature constant.
Eggs do not hatch at the same time (asynchronous hatching) and usually hatch about two days apart. The chicks are brooded for the first 15 days after which the chick attains control over its body temperature. The parents safeguard the chicks for the first 30 days, after which they are mostly left unguarded. The unguarded chicks may form crèches of up to 55 chicks. Chicks are dependent on their parents for food, which is fed by direct beak-to-beak regurgitation, and they only become independent of parental care three months after hatching.
The first moult occurs after 14 days followed by a second moult at 40–60 days, and juvenile plumage develops at 70–80 days. The chicks are fully fledged after 70–90 days. The fledgling juveniles will go out to sea on their own and return to their colony of birth after about 12– 22 months to moult into their adult plumage. The age at first reproduction ranges between four and six years and life expectancy is up to 27 years in the wild.
Moulting in birds is energetically expensive and African penguins have developed a moulting strategy that replaces all their feathers in a relatively short period of time in comparison to other birds. Moulting is essential for ensuring that penguins remain waterproof and insulated in cold water. During the pre-moulting phase, penguins will go out to sea to fatten themselves for the moulting period.
Pre moulting adults accumulate fat reserves needed during the moulting period by spending five weeks prior to moulting feeding to gain up to 31% of their normal body weight. During moulting penguins are unable to forage because their feathers are not yet waterproof and they therefore do not feed for about 18 days. After moulting, the penguins will head out to sea in their new feathers and spend about six weeks replacing the fat reserves (around 41% body weight) lost during the moulting period before the onset of the breeding season.
African penguins usually produce one to two eggs per clutch and incubation lasts 38–41 days. Responsibility to incubate the eggs is shared equally between both sexes. When one parent is incubating the egg, the other will head out to sea to forage or head out to collect vegetative nesting material. Each parent has an incubation ‘pouch’ located on the body to keep the incubation temperature constant.
Eggs do not hatch at the same time (asynchronous hatching) and usually hatch about two days apart. The chicks are brooded for the first 15 days after which the chick attains control over its body temperature. The parents safeguard the chicks for the first 30 days, after which they are mostly left unguarded. The unguarded chicks may form crèches of up to 55 chicks. Chicks are dependent on their parents for food, which is fed by direct beak-to-beak regurgitation, and they only become independent of parental care three months after hatching.
The first moult occurs after 14 days followed by a second moult at 40–60 days, and juvenile plumage develops at 70–80 days. The chicks are fully fledged after 70–90 days. The fledgling juveniles will go out to sea on their own and return to their colony of birth after about 12– 22 months to moult into their adult plumage. The age at first reproduction ranges between four and six years and life expectancy is up to 27 years in the wild.
Moulting in birds is energetically expensive and African penguins have developed a moulting strategy that replaces all their feathers in a relatively short period of time in comparison to other birds. Moulting is essential for ensuring that penguins remain waterproof and insulated in cold water. During the pre-moulting phase, penguins will go out to sea to fatten themselves for the moulting period.
Pre moulting adults accumulate fat reserves needed during the moulting period by spending five weeks prior to moulting feeding to gain up to 31% of their normal body weight. During moulting penguins are unable to forage because their feathers are not yet waterproof and they therefore do not feed for about 18 days. After moulting, the penguins will head out to sea in their new feathers and spend about six weeks replacing the fat reserves (around 41% body weight) lost during the moulting period before the onset of the breeding season.
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nan
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Re: African Penguin - Bird of the Month April 2015
superb, thank you to explain... much better than me, the transition
Kgalagadi lover… for ever
https://safrounet.piwigo.com/
https://safrounet.piwigo.com/
Re: African Penguin - Bird of the Month April 2015
Moulting eats up a lot of energy, but that's the cost of you want to have a fancy outfit as a teenager 
Your photos are too crazy, ExFmem
Your photos are too crazy, ExFmem
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Lisbeth
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Re: African Penguin - Bird of the Month April 2015
Better than baboons! 
"Education is the most powerful weapon which you can use to change the world." Nelson Mandela
The desire for equality must never exceed the demands of knowledge
The desire for equality must never exceed the demands of knowledge
Re: African Penguin - Bird of the Month April 2015
Anything is better than Boons!Lisbeth wrote:Better than baboons!
Hunting cannot be considered a sport as all contestants in a sport should know they are playing the game!
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Lisbeth
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Re: African Penguin - Bird of the Month April 2015
Saturday on the beach
"Education is the most powerful weapon which you can use to change the world." Nelson Mandela
The desire for equality must never exceed the demands of knowledge
The desire for equality must never exceed the demands of knowledge