The egg weighs 192 grams, and inside it was a second egg. This is the third such case for this bird, writes the Telegram channel "Minsk. Glavnoe!"

Screenshot from video
Dimensions of the giant: ~8.6 × 6.3 cm (normal egg ~5.7 × 4.2 cm).
This phenomenon is called a reduction in antiperistalsis: an already formed egg moves back along the oviduct, and a new shell forms around it.
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