By weight, which animal has the largest baby relative to body size?

Human childbirth is hard enough – imagine giving birth to a baby half your weight!

17th April 2018
By weight, which animal has the largest baby relative to body size?

Asked by: Emily Cane, Newcastle

Despite a kiwi being about the size of a chicken, the female lays an egg that is about half her weight! It’s so big because it has an enormous yolk, which sustains the chick for the first week of its life. Here you can see some other animals that have enormous babies, as well as those that have teeny tiny offspring (with humans thrown in for good measure).

Kiwi egg (1/2)

Which animal has the largest baby relative to body size? Kiwi © Alamy
© Alamy

Giraffe (1/10)

Which animal has the largest baby relative to body size? Giraffe © Alamy
© Getty

Beluga whale (1/17)

Which animal has the largest baby relative to body size? Beluga © Alamy
© Getty

Human (1/22)

Which animal has the largest baby relative to body size? Human © Getty
© Getty

Elephant (1/26)

Which animal has the largest baby relative to body size? Elephant © Getty
© Getty

Giant clam (1/500,000,000)

Which animal has the largest baby relative to body size? Giant clam © Getty
© Getty

Ocean sunfish (1/1,500,000)

Which animal has the largest baby relative to body size? Ocean sunfish © Getty
© Getty

Red kangaroo (1/100,000)

Which animal has the largest baby relative to body size? Red kangaroo © Getty
© Getty

Honey possum (1/2,400)

Which animal has the largest baby relative to body size? Honey possum © Getty
© Getty

Giant panda (1/900)

Which animal has the largest baby relative to body size? Giant panda © Getty
© Getty

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