Want to learn more?: https://www.audubon.org/news/why-kiwis-egg-so-big
Also, take a look at this egg-size comparison.
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Sam Dean “Why Is the Kiwi’s Egg So Big?” https://www.audubon.org/news/why-kiwis-egg-so-big last accessed 6. february 2021
Egg-size comparison on Wikipedia: https://www.wikiwand.com/en/Bird_egg#/Size last accessed 6. february 2021