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What does the Hummingbird have in common with the Kiwi (bird, not fruit)?

Answer:

Hummingbirds and Kiwis have the largest eggs, compared to their body size, of any bird. For both, the egg is about 25% of the female's body size, the equivalent of a 120 pound woman giving birth to a 30 pound baby. Which bird do you think has the smallest egg, compared to body size? The ostrich!
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