Baby Yingliang

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Age	72-66 million years old
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Baby Yingliang (YLSNHM01266[1]) is a remarkably intact dinosaur embryo discovered in Ganzhou, southern China. It is estimated to be 72 to 66 million years old. The embryo is considered to be a toothless theropod dinosaur, or oviraptorosaur. Researcher Dr. Fion Waisum Ma said, "It was the best dinosaur embryo found in history."[2][3][4] The embryo appears to be an extremely early organism displaying an embryonic positioning similar to modern birds, but Baby Yingliang is the first example to be found in dinosaurs. In birds, the behavior known as "tucking" is controlled by the central nervous system and positions the head below the body, the feet on either side of the head and the back curled. The position aids in successful hatching.[5]

References

Xing, Lida; Niu, Kecheng; Ma, Waisum; Zelenitsky, Darla K.; Yang, Tzu-Ruei; Brusatte, Stephen L. (2022). "An exquisitely preserved in-ovo theropod dinosaur embryo sheds light on avian-like prehatching postures". iScience. 25 (1): 103516. Bibcode:2022iSci...25j3516X. doi:10.1016/j.isci.2021.103516. PMC 8786642. PMID 35106456.
"Perfectly preserved dinosaur embryo found in China". BBC News. 21 December 2021.
"One-of-a-kind perfectly preserved dinosaur embryo discovered inside its fossilized egg". 22 December 2021.
"A dinosaur embryo, exceptionally preserved in an egg about to hatch, reveals links to birds".
Ahmed, Issam (2021-12-26). "Perfectly preserved dinosaur embryo was preparing to hatch like a bird". Phys.org. Archived from the original on 2021-12-26. Retrieved 2021-12-27.

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[1] Xing, Lida; Niu, Kecheng; Ma, Waisum; Zelenitsky, Darla K.; Yang, Tzu-Ruei; Brusatte, Stephen L. (2022). "An exquisitely preserved in-ovo theropod dinosaur embryo sheds light on avian-like prehatching postures". iScience. 25 (1): 103516. Bibcode:2022iSci...25j3516X. doi:10.1016/j.isci.2021.103516. PMC 8786642. PMID 35106456.

[2] "Perfectly preserved dinosaur embryo found in China". BBC News. 21 December 2021.

[3] "One-of-a-kind perfectly preserved dinosaur embryo discovered inside its fossilized egg". 22 December 2021.

[4] "A dinosaur embryo, exceptionally preserved in an egg about to hatch, reveals links to birds".

[5] Ahmed, Issam (2021-12-26). "Perfectly preserved dinosaur embryo was preparing to hatch like a bird". Phys.org. Archived from the original on 2021-12-26. Retrieved 2021-12-27.