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Enormous Egg | 台北市立動物園資訊網

Enormous Egg

Thekiwi'seggishuge.Inproportiontoitsbodysize,thefemalekiwilaysabiggereggthanalmostanyotherbird.Infact,kiwieggsaresix-timesas ...

 Enormous Egg

Why such a big egg?

It is still not clear why the kiwi produces such a large egg. Some researchers believe the kiwi has always been a small bird, and that its egg has grown. Others suggest the kiwi was once much larger and, while the bird shrank over time, its egg did not.

It seems the latter explanation is more likely, because gradual evolutionary changes to an adult bird’s characteristics are more likely to be survived than changes to an egg or fetus.

If the latter theory is true, the kiwi’s ancient ancestor would have probably been about the size of a cassowary, measuring up to 1.5 metres tall.

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Enormous Egg | 台北市立動物園資訊網
The kiwi's egg is huge. In proportion to its body size, the female kiwi lays a bigger egg than almost any other bird. In fact, kiwi eggs are six-times as ... Read More
Producing an egg | 台北市立動物園資訊網
Because of their size, kiwi could be expected to lay an egg about the size of a hen's egg. In fact, the kiwi egg is six times as big as normal for a bird its size. Read More
Incubating the egg | 台北市立動物園資訊網
Kiwi invest a lot of energy in incubating their eggs. The average incubation time is 70-80 days, more than twice what is normal for a bird and about the same as ... Read More
Why Is the Kiwi's Egg So Big? | 台北市立動物園資訊網
2015年2月25日 — The giant egg means that kiwi chicks hatch pretty much ready to run, with a belly full of yolk that they can live off of for their first two and a half ... Read More
The kiwi's egg is huge. In proportion to its body size | 台北市立動物園資訊網
The kiwi's egg is huge. In proportion to its body size, the female kiwi lays a bigger egg than almost any other bird. In fact, kiwi eggs are six-times as big as normal ... Read More
Do Kiwi Birds Lay Ridiculously Large Eggs? | 台北市立動物園資訊網
The kiwi, a flightless bird about the size of a hen that is native to New Zealand, has one of the largest egg-to-body ratios of any bird. According to ... Read More
"Eggseptional" | 台北市立動物園資訊網
The female kiwi is one of 1% of birds on the planet with two functional ovaries. Northland Brown kiwi will lay 2 eggs 3-4 weeks apart for the first clutch. A second​ ... Read More
The Large Egg of a Kiwi bird - Awesci | 台北市立動物園資訊網
2015年10月14日 — By Anupum Pant ... Kiwi is a strange creature. Although a bird, it's a lot like a mammal. Some biologists even call it a honorary mammal. That all ... Read More
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