How long are penguins pregnant?

The female lays one egg in May or June, transfers the egg to the male, and returns to sea to feed while the male incubates the egg in his brood pouch for about 65 days.

biologicaldiversity.org - Emperor penguin - Center for Biological Diversity

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NATURAL HISTORY

EMPEROR PENGUIN } Aptenodytes forsteri

FAMILY: Spheniscidae

DESCRIPTION: The largest of the world's penguin species, the emperor penguin stands almost four feet tall and weighs 70 to 90 pounds. It has a gray back, white belly, and orange markings behind its eyes and at the top of its chest. HABITAT: This penguin is the most ice-adapted of any penguin species, inhabiting pack ice and surrounding marine areas. RANGE: The emperor penguin ranges throughout coastal Antarctica and may be seen up to 56 miles inland during the breeding season. (Check out a map of the emperor's range.) MIGRATION: Emperor penguins make yearly travels inland to breeding sites in the early spring. Near the beginning of summer, adult penguins and their chicks return to the sea and spend the rest of the summer feeding there. BREEDING: Emperor penguins begin courtship in March or April and are serially monogamous, typically taking one mate per year. The female lays one egg in May or June, transfers the egg to the male, and returns to sea to feed while the male incubates the egg in his brood pouch for about 65 days. After the chick hatches, the male sets the chick on his feet and covers it with his pouch, feeding it a white, milky substance produced by a gland in his esophagus. When the female returns from feeding, the male departs the breeding site to take his turn feeding. A few weeks later, he returns and both parents tend the chick by feeding it regurgitated food and keeping it off the ice. Offspring mortality may result from a variety of causes, including dropping the egg during the initial transfer from female to male, insufficient prey availability, and extreme weather. LIFE CYCLE: The emperor penguin typically lives 15 to 20 years in the wild, but some records indicate a maximum lifespan of 40 years.

FEEDING: Emperor penguins primarily eat krill, fish and squid.

THREATS: Emperor penguins are seriously threatened by global warming, which causes profound changes in the Antarctic ecosystem and impacts them in diverse ways, such as by causing the early break-up of the sea ice they need for raising their chicks, reducing populations of prey species, and causing ice shelves to collapse and icebergs to calve. Scientists project that 80% of the world’s emperor penguins may disappear by the end of the century without drastic cuts in carbon pollution. These penguins are also threatened by ocean acidification and industrial fisheries, which further reduce prey availability. POPULATION TREND: This species has 54 known breeding colonies. Colonies are declining in parts of Antarctica where sea ice is breaking up early due to global warming. The emperor penguin colony at Point Géologie featured in the film March of the Penguins has declined by almost half. The colony at Halley Bay suffered catastrophic breeding failure due to record-low sea ice and early ice breakup. In 2016 more than 10,000 chicks were thought to have drowned when the sea ice broke up before they were ready to swim.

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Why do first daughters look like their fathers?

There's an old theory that says first-born babies were genetically predispositioned to look more like their father. It was believed this was so the father accepted the child was his and would provide and care for them.

kiindred.co - Do first-born babies actually look more like their fathers? - Kiindred

There’s an old theory that says first-born babies were genetically predispositioned to look more like their father. It was believed this was so the father accepted the child was his and would provide and care for them. There’s also another theory that says it was so he didn’t eat the baby… These theories obviously date way, way back, long before paternity tests existed (or cannibalism was frowned upon). But even today, all new parents can’t help but look at their baby and wonder, who does it look like? It’s often one of the first things people will comment on when they meet a little one for the first time.

But is there actually any truth to the theory at all?

A 1995 study from the University of California sought to prove the theory by matching photos of 1-year-old children with pictures of their father. The study asked 122 participants to match photos of children at 1-year, 10-years and 20-years with photos of both their mothers and fathers. In infants, just under 50% guessed correctly for the fathers, as opposed to around 37% for the mothers. The success rates decreased significantly in 10-year-olds and rose slightly again in 20-year-olds. A similar study in 2004 with a much larger sample size found that, in fact, most infants resemble both parents equally. In concluding the study, co-author and psychologist at the University of Padova in Italy Paola Bressan noted that to the best of her knowledge, “no study has either replicated or supported” the findings from the 1995 study that stated babies resemble their fathers.

But even though the science isn’t there to back up the theory, why do so many of us say it rings true, that firstborns do tend to look more like their father?

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