ALLOSAURUS
Allosaurus fragilis
DESCRIPTION
Allosaurus fragilis was a large theropod dinosaur that lived during the Late Jurassic period. It is characterized by its large skull, sharp teeth, and long, powerful limbs, which made it an effective predator. Allosaurus was likely a social animal, often hunting in packs, and it played a significant role in its ecosystem as a top predator.
FUN FACTS
- Allosaurus was one of the first large carnivorous dinosaurs to be discovered, with fossils first found in the late 19th century
- Its name means 'different lizard,' reflecting its unique features compared to other dinosaurs of its time
- | The Allosaurus had a unique hunting strategy that involved using its powerful arms and sharp claws to grasp and hold onto prey while delivering fatal bites with its serrated teeth
- This adaptation made it a formidable predator in the Jurassic ecosystem
QUICK INFO
Lifespan20-30 years
Average Weight1,000-2,500 kg
Average Length8.5-12 m
Diet TypeCarnivore
Social Structuregroup — often thought to hunt in packs for cooperative hunting strategies.
Activity PatternDiurnal
Breeding Seasonunknown
- Habitat
- Allosaurus inhabited a variety of environments, including floodplains and forests. These habitats provided ample opportunities for hunting and foraging.
- Biomes
- Temperate Forest, Floodplain
- Native Range
- North America, particularly in what is now the western United States.
- Continent
- North America
- Countries
- United States
- Diet
- Allosaurus was a carnivore that primarily fed on large herbivorous dinosaurs. Its sharp teeth and strong jaws allowed it to take down prey much larger than itself.
- Diet Type
- Carnivore
- Favorite Food
- large herbivorous dinosaurs
- Social Structure
- group — often thought to hunt in packs for cooperative hunting strategies.
- Activity Pattern
- Diurnal
- Group Size
- 5-10
- Territorial
- 1
1,000-2,500 kg
Weight
8.5-12 m
Length
3.5 m at hip
Height (Shoulder)
- Coloration
- likely had a mix of browns and greens for camouflage.
- Lifespan
- 20-30 years
- Offspring per Birth
- 1-3
- Sexual Maturity
- approximately 10 years
- Breeding Season
- unknown
DD
Data Deficient
IUCN Red List Status
- Population Status
- Fossil evidence suggests that Allosaurus was relatively common in its time, but exact population numbers are unknown.
- Population Trend
- Unknown
- Endangered
- 0
- Threats
- As an extinct species, Allosaurus faced threats from environmental changes and competition with other predators during its time. Its extinction was likely due to a combination of factors, including climate change and habitat loss.
- Defense Mechanisms
- Allosaurus likely relied on its size, speed, and pack behavior for defense against larger predators.
- Found in Zoos
- Rare