Reptiles are a cold-blooded vertebrate animal class that regularly sheds their outer layer of skin, yet are also very similar to birds (in fact, the crocodile is more closely related to a bird than to a lizard). Reptiles are not as old as fish, with the earliest reptile on record emerging 315 million years ago, but they were the dominant class during the Mesozoic age until the extinction of the dinosaurs. Like birds, reptiles are an air-breathing class with many of its species laying eggs instead of giving birth to live young. In fact, out of all the reptiles, the only species to give birth to live young are boas and pythons. Being cold-blooded without the ability to regulate their internal temperature, Reptiles become inactive during the cooler times of the year.

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5'6" | 1.67 m
16' | 4.85 m
Ankylosaurus
167.000
485.000
66000
3D
Ankylosaurus
31’-43’ | 9.4-13 m
8’-11’ | 2.4-3.4 m
59’-69’ | 18-21 m
77,000-123,000 lb | 35-56 metric tons
Brachiosaurus
1300.000
340.000
2100.000
56000.000
61000
3D
Brachiosaurus
27.0”-36.0” | 69-91 cm
48.0”-60.0” | 122-152 cm
330-550 lb | 150-250 kg
100-150 (wild), 175 (captivity)
Galápagos Giant Tortoise
91.000
152.000
250.000
175.00
1100
3D
Galápagos Giant Tortoise
11.5' | 3.5 m
46' | 14 m
Plesiosaurus
350.000
1400.000
14000
3D
Plesiosaurus
19.5' | 6 m
6' | 1.83 m
Pterodactyl
600.000
183.000
116000
3D
Pterodactyl
14’-23’ | 4.25-7 m (Male); 7.5’-11’ | 2.30-3.35 m (Female)
880-2200 lb | 400-1000 kg (Male); 180-220 lb | 82-100 kg (Female)
70-100 (wild); 100-120 (captivity)
Saltwater Crocodile
700.000
1000.000
120.00
31000
3D
Saltwater Crocodile
21.5’ | 6.5 m
5.7’ | 1.7 m
49’-51’ | 15-15.6 m
14,100-15,900 lb | 6.4-7.2 metric tons
Spinosaurus
650.000
170.000
1560.000
7200.000
102000
3D
Spinosaurus
14’ | 4.3 m
6’ | 1.8 m
30’ | 9.1 m
11,700-15,400 lb | 5.3-7 metric tons
Stegosaurus
430.000
180.000
910.000
7000.000
90000
3D
Stegosaurus
9.5’-10.0’ | 2.9-3 m
6.7’ | 2 m
26’-29.5’ | 7.9-9 m
13,500-26,500 lb | 6.1-12 metric tons
Triceratops
300.000
200.000
900.000
12000.000
97000
3D
Triceratops
17’ | 5.2 m
6’ | 1.8 m
40’ | 12.3 m
18,500-30,800 lb | 8.4-14 metric tons
Tyrannosaurus
520.000
180.000
12300.000
14000.000
94000
3D
Tyrannosaurus
5'6" | 1.67 m
13' | 3.96 m
Velociraptor
167.000
396.000
157000
3D
Velociraptor
Triceratops
Illustration comparing the size of a Triceratops to a human with dimensions for height and length

Triceratops were three-horned herbivorous dinosaurs that roamed western North America in the late Cretaceous period (68-66 Mya). Combined with a shield-like head plate, the horns of the Triceratops were likely used to protect them from predators and may have also been used for mating rituals.

The Triceratops had a length between 26’-29.5’ (7.9-9 m), stood at a height of 9.5’-10’ (2.9-3 m), and had a width of 6.7' (2 m). A typical Triceratops weighed between 13,500-26,500 lb (6.1-12 metric tons).

Drawings of a Triceratops from the side, front, back, and aerial views
Triceratops were three-horned herbivorous dinosaurs that roamed during the late Cretaceous period (68-66 Mya). Combined with head plate, the horns of the Triceratops were used to protect them from predators.

The Triceratops had a length between 26’-29.5’ (7.9-9 m), stood at a height of 9.5’-10’ (2.9-3 m), and had a width of 6.7' (2 m). A typical Triceratops weighed between 13,500-26,500 lb (6.1-12 metric tons).

Drawings of a Triceratops from the side, front, back, and aerial views
Triceratops
Height:
9.5’-10.0’ | 2.9-3 m
Width:
6.7’ | 2 m
Length:
26’-29.5’ | 7.9-9 m
Depth:
Weight:
13,500-26,500 lb | 6.1-12 metric tons
Area:

Period: Late Cretaceous (68-66 million years ago)

Scientific Name
Triceratops

Drawings include:
Triceratops side elevation, front, back, plan

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Iguana
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Pythons
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Galápagos Giant Tortoise
Dimensioned size comparison drawing of a Galápagos Giant Tortoise compared to the size of an average person

The Galapagos Giant Tortoise, also referred to as the Galapagos tortoise, inhabits only two remote archipelagos: the Galapagos Islands 1000 km west of mainland Ecuador, and Aldabra in the Indian Ocean, 700 km east of Tanzania. They are the largest living species of tortoise, with tortoises on islands with humid highlands being larger with domed shells and short necks. Tortoises on islands with dry lowlands tend to be smaller. Distinguishing characteristics include a large bony shell of a dull brown or gray color that can hold its head, neck, and fore limbs when drawn back for protection. The Galapagos tortoise is an herbivore that consumes a diet of cacti, grasses, leaves, lichens, berries, oranges, and milkweed.

The typical Galápagos Giant Tortoise has an overall height of 27.0”-36.0” (69-91 cm) and body length of 48.0”-60.0” (122-152 cm). An average Galápagos Giant Tortoise weighs between 330-550 lb (150-250 kg) and has a typical lifespan of 100-150 (wild), 175 (captivity).

Series of elevation and plan illustrations of a Galápagos Giant Tortoise in various positions
The Galapagos Giant Tortoise is the largest living species of tortoise and inhabits only two remote archipelagos. Distinguishing characteristics include a large bony shell of a dull brown or gray color that can hold its head, neck, and fore limbs when drawn back for protection.

The typical Galápagos Giant Tortoise has an overall height of 27.0”-36.0” (69-91 cm) and body length of 48.0”-60.0” (122-152 cm). An average Galápagos Giant Tortoise weighs between 330-550 lb (150-250 kg) and has a typical lifespan of 100-150 (wild), 175 (captivity).

Series of elevation and plan illustrations of a Galápagos Giant Tortoise in various positions
Galápagos Giant Tortoise
Height:
27.0”-36.0” | 69-91 cm
Width:
Length:
48.0”-60.0” | 122-152 cm
Depth:
Weight:
330-550 lb | 150-250 kg
Area:
Scientific Name
Chelonoidis nigra
Lifespan
100-150 (wild), 175 (captivity)

Drawings include:
Galápagos Giant Tortoise side elevation, side (person), side (walking), front, plan

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Brachiosaurus
Size comparison drawing of the Brachiosaurus to an average human with dimensions shown for length and height

Brachiosaurus was an extremely tall dinosaur that lived during the Late Jurassic period (154-153 Mya). Built for browsing for foliage high above the ground surface, Brachiosaurus is characterized by its long neck and body, small head, and larger forelimbs than hind limbs.

Brachiosaurus is characterized by its long neck and body resulting in a height of 31’-43’ (9.4-13 m), body length of 59’-69’ (18-21 m), and width of 8’-11’ (2.4-3.4 m). A typically Brachiosaurus weighed between 77,000-123,000 lb (35-56 metric tons).

Drawings of a Brachiosaurus from the side, front, back, and aerial
Brachiosaurus was an extremely tall dinosaur that lived during the Late Jurassic with features adapted for browsing for foliage high above the ground surface.

Brachiosaurus is characterized by its long neck and body resulting in a height of 31’-43’ (9.4-13 m), body length of 59’-69’ (18-21 m), and width of 8’-11’ (2.4-3.4 m). A typically Brachiosaurus weighed between 77,000-123,000 lb (35-56 metric tons).

Drawings of a Brachiosaurus from the side, front, back, and aerial
Brachiosaurus
Height:
31’-43’ | 9.4-13 m
Width:
8’-11’ | 2.4-3.4 m
Length:
59’-69’ | 18-21 m
Depth:
Weight:
77,000-123,000 lb | 35-56 metric tons
Area:

Period: Late Jurassic (154-153 million years ago)

Scientific Name
Brachiosaurus

Drawings include:
Brachiosaurus side elevation, front, back, plan

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