🥚 Researchers replicate a dinosaur nest with its eggs

Oviraptors, these feathered dinosaurs, intrigue scientists with their brooding method. While they share many traits with modern birds, their incubation method might ultimately be closer to that of reptiles.

To learn more, a team reconstructed a full-scale oviraptor nest, based on the species Heyuannia huangi, which lived about 70 million years ago. The semi-open nest and the eggs arranged in concentric circles were reproduced accurately, using modern materials to imitate the dinosaur and its eggs. This approach allows exploration of behavioral aspects that usually escape study based solely on fossils.


The experiments showed that the position of the brooding adult altered the eggs' temperature. In cold conditions, eggs in the outer ring could be up to 11°F (6°C) cooler than those in the center. This thermal divergence could lead to staggered hatching within the same clutch. On the other hand, under a warm climate, the differences were reduced, with the sun then actively contributing to warming the eggs.

Compared to current birds, oviraptor incubation seems less efficient. These dinosaurs probably could not maintain thermoregulatory contact with all of their eggs due to their ring-like arrangement. The researchers rather suggest co-incubation, mixing the adult's body heat and the sun's energy input. This adaptation was likely well suited to their semi-open nests, representing an evolutionary step between buried nests and those of modern birds.


This research is based on a discipline called experimental paleontology. It aims to test hypotheses about extinct species by recreating conditions or behaviors. Here, scientists relied on skeletal morphology, the structure of fossilized nests, and egg shape to build a physical model. This method, often combined with computer simulations, helps reduce uncertainties linked to the direct interpretation of fossils and paves the way for innovative discoveries about ancient life.

The researchers acknowledge some limitations, notably the climatic differences between the Cretaceous and today. Nevertheless, their approach, which combines concrete experiments and modeling, opens new avenues for examining the reproduction of extinct species. It proves that paleontological research can progress even without local fossils.