The largest dinosaurs were over 100 feet (30 m) long and up to 50 feet (15 m) tall such as Argentinosaurus, Brachiosaurus, Seismosaurus and Supersaurus. Some of the smallest dinosaurs, such as Compsognathus and Microraptor were about the size of a chicken.
Small dinosaurs fossils are harder to find and are weathered away easily however, of all the dinosaur fossils found, the smallest are about the size of a chicken. These Dinosaurs include:
- Compsognathus: Chicken-sized Theropod Dinosaur. Length: 3 feet (1 m). Weigth: about 1.8 – 7.7 lb (0.8 – 3.5 kg).
- Microrapter: - Four winged Therapod Dinosaur. Length: 2.5 feet (77 cm).
- Lesothasaurus: Fast running herbivore. Length: 3 feet (1 m).
Compsognathus image courtesy of science-resources.co.uk
Name Means: "Pretty Jaw"
Length: 4 feet 6 in (1.4 m)
Height: 1 foot (0.3 m)
Weight: 6 pounds (3 kg)
Diet: Carnivore (Insects, Lizards, Meat)
Time: Late Jurassic
Habitat: Desert Island
Fossils Found: Europe
Compsognathus Size image courtesy of science-resources.co.uk
The tallest of all the known Dinosaurs were the Brachiosaurid Sauropods. The Brachiosarids were gigantic herbivorous Dinosuars. Their most stricking feature, other than their shear size, was their long fore legs which were much longer than their hind legs. These sauropods are amongst the largest land animals known to have ever walked the Earth:
- Brachiosaurus: Length: 85 feet (26 m); Height: 40 feet; Weight: Approx. 30-40 tons.
- Sauroposeidon: Length: 112 feet (34 m); Height: 56 feet (17 m); Weight: Approx. 50-60 tons.
Brachiosaurus image courtesy of science-resources.co.uk
Brachiosaurus Size image courtesy of science-resources.co.uk
The longest dinosaurs were the sauropods, in particular the diplodocid sauropods such as Supersaurus and titanosaurid sauropods such as Argentinosaurus. These Dinosaurs had very long necks which were counterbalanced by huge tails. Some of the largest sauropods included: