A nesting dinosaur

  title={A nesting dinosaur},
  author={Mark A. Norell and James M. Clark and Luis Mar{\'i}a Chiappe and Demberelyin Dashzeveg},
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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Extraordinary preservation in a new vertebrate assemblage from the Late Cretaceous of Mongolia

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