A nesting dinosaur

@article{Norell1995AND,
  title={A nesting dinosaur},
  author={Mark A. Norell and James M. Clark and Luis Mar{\'i}a Chiappe and Demberelyin Dashzeveg},
  journal={Nature},
  year={1995},
  volume={378},
  pages={774-776}
}
A SPECTACULAR fossil specimen that suggests the presence of an avian type of nesting behaviour in oviraptorids, a clade of non-avian maniraptoran theropods, is reported here. The substantial evidence indicating that birds are a type of theropod dinosaur has led to copious discussion concerning the origin and possible presence of advanced avian reproductive behaviour in non-avian dinosaurs. Although the inference of behaviour from fossils is problematic, some remarkable discoveries, such as the… 

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The results suggest that the smallest oviraptorosaurs probably sat directly on the eggs, whereas with increasing body size more weight was likely carried by the central opening, reducing or eliminating the load on the Eggs and still potentially allowing for some contact during incubation in giant species.

RARE IN SITU PRESERVATION OF ADULT CROCODYLIAN WITH EGGS FROM THE MIDDLE EOCENE OF GEISELTAL, GERMANY

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