Microraptor (Microraptor zhaoianus Xu et al., 2000) - Size, Diet & Cretaceous Period Facts

Q: What makes Microraptor scientifically significant?

Microraptor provides critical insights into the evolutionary radiation of Theropoda. Holotypes and fossil evidence indicate: Hundreds of exceptionally preserved slabs showing intact skeletons with full feather halos and melanosomes.

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Microraptor (Microraptor zhaoianus Xu et al., 2000) - Size, Diet & Cretaceous Period Facts | DinoOrigin

Evolutionary Taxonomy & Cladistics

View Dinosaur Phylogeny

Phylogenetic classification of Microraptor zhaoianus Xu et al., 2000 based on peer-reviewed cladistic analyses of diagnostic skeletal synapomorphies.

Taxonomic Rank	Taxon / Clade	Diagnostic Context
Kingdom	Animalia	Monophyletic prehistoric clade
Phylum	Chordata	Monophyletic prehistoric clade
Clade	Dinosauria	Monophyletic prehistoric clade
Order	Saurischia (Lizard-Hipped Dinosaurs)	Characterized ancestrally by a triradiate pelvis with an anteriorly pointing pubis.
Suborder	Theropoda	Bipedal saurischian dinosaurs, historically dominated by carnivores and including the avian lineage.
Genus	Microraptor	Monophyletic prehistoric clade
Species	Microraptor zhaoianus Xu et al., 2000	Specific authority designation

Anatomy & Physical Characteristics

Microraptor was a tiny, pigeon-to-crow-sized dromaeosaurid from the famous Jehol Biota of Liaoning, China. It is celebrated for having flight feathers not only on its arms but also on its lower hind legs, forming a functional 'four-winged' aerodynamic surface.

Microscopic analysis of fossilized melanosomes preserved in its plumage revealed that Microraptor possessed glossy, iridescent black feathers, comparable to the plumage of modern crows or grackles.

Diagnostic Morphological Traits

Small feathered theropod with iridescent black plumage, asymmetrical flight feathers on wings and legs, and a fan-tipped tail.

Comparative Scale & Biometrics

Anatomical dimensions relative to an average adult human (1.8 m / 6 ft tall)

Approx. 0.5× human length

Microraptor (Length)0.7–0.9 m (2.3–3.0 ft)

Adult Human1.8 m (6.0 ft)

Length

0.7–0.9 m (2.3–3.0 ft)

Height

0.25–0.35 m (0.8–1.1 ft)

Estimated Mass

0.8–1.5 kg (2–3 lbs)

Biometric Human Scale Reference

Microraptor human scale comparison diagram illustrating estimated body proportions

Comparative size scale of Microraptor relative to a 1.8-meter adult human, illustrating an estimated length of 0.7–0.9 m and height of 0.3–0.3 m (preserving model uncertainty).

Diet & Feeding Ecology

All Carnivore Species

Trophic Guild: Carnivore

Arboreal mammals, small lizards, fish, and early birds preserved in gut contents.

Paleobiology & Behavior

Small, arboreal four-winged dromaeosaurid capable of biplane gliding between forest canopies. Preserved in the Jehol Biota of Liaoning, Microraptor foraged for small vertebrates alongside other feathered contemporaries including Sinornithosaurus and ground-dwelling Caudipteryx.

Habitat & Ecological Biome

Prehistoric Depositional Setting

Dense temperate conifer and ginkgo forests surrounding freshwater volcanic lakes.

Fossil Evidence & Specimen Records

Preserved Skeletal Material & Bonebeds

Hundreds of exceptionally preserved slabs showing intact skeletons with full feather halos and melanosomes.

Anatomical Osteology & Skeletal Reconstruction

Microraptor scientific skeletal reconstruction and anatomical osteology diagram

Anatomical skeletal reconstruction of Microraptor (Microraptor zhaoianus Xu et al., 2000) illustrating cranial fenestrae, vertebral column, and appendicular proportions based on composite fossil material.

Discovery & Taxonomic Naming History

Year of Discovery / Description2000

Type Specimen Locality & FormationJiufotang Formation, Liaoning, China

Discovered by Xu Xing, Zhou Zhonghe, and Wang Xiaolin in volcanic shale beds.

Geological Era & Chronostratigraphy

Explore All Cretaceous Period Fauna

Cretaceous Period PeriodTemporal Interval: 125–120 Ma (million years ago)

The longest and final period of the Mesozoic Era, characterized by the rise of flowering plants, ceratopsians, hadrosaurs, tyrannosaurids, and concluding with the Chicxulub asteroid impact.

Where It Lived & Paleoenvironment

Asia Dinosaurs

During the Mesozoic Era, continental drift progressively reconfigured land bridges, atmospheric currents, and regional precipitation regimes. Fossils of Microraptor evidence its adaptation to the paleoenvironments of Asia.

Paleogeographic RealmAsia (Asia)

Renowned for the exceptionally preserved feathered dinosaurs of Liaoning, China and the Cretaceous dune habitats of the Gobi Desert in Mongolia.

Fossil Discovery Locality

Scientific Significance & Evolutionary Impact

The anatomical architecture of Microraptor serves as a crucial benchmark in vertebrate paleontology, illustrating key adaptive radiations within Theropoda.

Phylogenetic Placement: Informs cladistic debates concerning the divergence, skull biomechanics, and skeletal evolution of Cretaceous Period fauna.
Paleoecological Guild: Documents trophic specialization (Carnivore) and predator-prey dynamics across its regional ecosystem.
Taphonomic Record: Hundreds of exceptionally preserved slabs showing intact skeletons with full feather halos and melanosomes.

Frequently Asked Questions About Microraptor

Scientifically verified answers based on peer-reviewed paleontological evidence.

Q1.When did Microraptor live?

Microraptor lived during the Cretaceous Period Period, approximately 125–120 Ma (million years ago). This places it within the Mesozoic Era.

Q2.How big was Microraptor?

Paleontological estimates place Microraptor at a length of 0.7–0.9 m (2.3–3.0 ft), a hip/standing height of 0.25–0.35 m (0.8–1.1 ft), and a body mass of 0.8–1.5 kg (2–3 lbs).

Q3.What was the diet of Microraptor?

Classified as a carnivore, Microraptor specialized in consuming Arboreal mammals, small lizards, fish, and early birds preserved in gut contents..

Q4.Where were Microraptor fossils discovered?

Fossil specimens of Microraptor have been recovered from Jiufotang Formation, Liaoning, China, with notable historic specimens documented in 2000. Discovered by Xu Xing, Zhou Zhonghe, and Wang Xiaolin in volcanic shale beds.

What makes Microraptor scientifically significant?

Academic Literature & Peer-Reviewed References

Authoritative citations establishing the factual taxonomy, biometrics, and anatomy of Microraptor.

NatureView Publication
Xu, X., Zhou, Z., & Wang, X. (2000). The smallest known non-avian theropod dinosaur. Nature, 408(6813), 705-708. https://doi.org/10.1038/35047056
Curated & Verified: 2026-09-24
NatureView Publication

Microraptor

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