Dinosaur Biology & Behavior

Understanding dinosaur biology and behavior comes from fossils, including bones, tracks, nests, eggs, skin impressions, and occasionally soft tissues.

Body Temperature & Metabolism

Evidence (bone growth rates, posture, active lifestyles, feathered forms) suggests many dinosaurs had high metabolisms, somewhere between typical reptiles and modern birds/mammals.
Some may have been warm‑blooded (endothermic) or mesothermic (intermediate).

Feathers, Skin, and Color

Many theropod dinosaurs had feathers or feather‑like structures.
Some small dinosaurs show preserved color patterns in fossilized feathers.
Other dinosaurs had scaly skin, often with bony armor (osteoderms) in groups like ankylosaurs.

Growth & Lifespan

Bone studies show many dinosaurs grew rapidly, especially medium‑ and large‑sized species.
Some large dinosaurs may have lived for decades.

Reproduction & Nesting

All dinosaurs laid eggs.
Some species:
- Built nests and laid eggs in colonies.
- Show evidence of parental care, such as adults staying near nests or juveniles.

Behavior

Trackways and bone beds suggest herding in some herbivores (e.g., hadrosaurs, ceratopsians).
Head crests, frills, horns, and plates likely played roles in display, species recognition, and sometimes defense.
Predatory dinosaurs show adaptations for active hunting, including keen senses, grasping hands, and sharp teeth or claws.

Overall, dinosaurs were likely active, complex animals, with many behaviors similar to those of modern birds and mammals.