Extinct | Prehistoric Animals

The earliest Prehistoric animals to live were jawless, spineless creatures that roamed the oceans about 540 million years ago. It wasn’t until the Devonian period, 400 million years ago, when the prehistoric creatures grew legs and left the ocean, these are the prehistoric ancestors to all vertebrate creatures on earth today. Once on land, the prehistoric creatures underwent a bunch of different adaptations for running, crawling, flying, and jumping; it was then when the rise of the dinosaurs took place, in the Triassic period about 230 million years ago. Even though the dinosaurs ruled, many small, rodent-like mammals were alive and these small mammals, along with some birds, amphibians, and reptiles survived the mass extinction that wiped out the dinosaurs. Although 90% of the species that have lived on Earth throughout its existence are extinct, most of the creatures that survived this first mass extinction still exist today.

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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
4’7”-5’7” | 1.4-1.7 m
8’8”-11’6” | 2.7-3.5 m
500-1300 lb | 227-590 kg
Cave Bear
170.000
350.000
590.000
13000
3D
Cave Bear
6’6”-7’ | 198-213 cm
9’10”-10’6” | 3-3.2 m
1190-1543 lb | 540-700 kg
10-15 years
Irish Elk
213.000
320.000
700.000
15.00
19000
3D
Irish Elk
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
4’-6’ | 1.22-1.83 m
6’9”-9’6” | 2.06-2.9 m
650-2200 lb | 295-998 kg
Short-Faced Bear
183.000
290.000
998.000
16700
3D
Short-Faced Bear
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
20”-27” | 51-69 cm
39”-51” | 99-130 cm
35-65 lb | 16-29 kg
5-7 years (wild); up to 8-11 years (captivity)
Thylacine
69.000
130.000
29.000
11.00
44000
3D
Thylacine
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
Stegosaurus
Size comparison drawing with dimensions of a Stegosaurus and an average human

Stegosaurus was a Late Jurassic (155-150 Mya) herbivorous quadrupedal dinosaur known for its array of upright plates on its back and strong spiked tail. Heavily built with short limbs, a small head, and large body, Stegosaurus was a defensive dinosaur that likely foraged for twigs and low hanging fruits.

Stegosaurus had a body length of 30’ (9.1 m), a height of 14’ | 4.3 m, and a width of 6' (1.8 m). Stegosaurus typically weighed between 11,700-15,400 lb (5.3-7 metric tons).

Drawing collection illustrating the front, back, side, and plan profiles of a Stegosaurus
Stegosaurus was a Late Jurassic herbivorous quadrupedal dinosaur known for its array of upright plates on its back and spiked tail.

Stegosaurus had a body length of 30’ (9.1 m), a height of 14’ | 4.3 m, and a width of 6' (1.8 m). Stegosaurus typically weighed between 11,700-15,400 lb (5.3-7 metric tons).

Drawing collection illustrating the front, back, side, and plan profiles of a Stegosaurus
Stegosaurus
Height:
14’ | 4.3 m
Width:
6’ | 1.8 m
Length:
30’ | 9.1 m
Depth:
Weight:
11,700-15,400 lb | 5.3-7 metric tons
Area:

Period: Late Jurassic (155-150 million years ago)

Scientific Name
Stegosaurus

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

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Velociraptor | Utahraptor

The Velociraptor had an overall length of 13' (3.96 m) and stood roughly 5'6" (1.67 m) tall.

Comparison drawing of the scale of a Velociraptor to a human showing dimensions of length and height

The Velociraptor had an overall length of 13' (3.96 m) and stood roughly 5'6" (1.67 m) tall.

Comparison drawing of the scale of a Velociraptor to a human showing dimensions of length and height
Velociraptor | Utahraptor
Height:
5'6" | 1.67 m
Width:
Length:
13' | 3.96 m
Depth:
Weight:
Area:
Scientific Name
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Short-Faced Bear
Comparison illustration of the size of a Short-Faced Bear to an average human

The Short-Faced Bear (Arctodus sp.) is a genus of extinct bears that lived in North America from approximately 11,000 years earlier in the Pleistocene period. It was the earliest North American bear and the largest in California. The bear could run up to 40 miles an hour and scare off or threaten other competitors from prey. To survive, the Short-Faced Bear has been estimated to have had to eat 35 pounds of meat each day. The Short-Faced Bear would weigh 2,000 pounds, for comparison, a male grizzly weighs approximately 600 pounds.

Male Short-Faced Bears had a shoulder height between 5’-6’ (1.52-1.83 m )and a weight in the range of 1750-2200 lb (794-998 kg). The shoulder heights of females were between 4’-5’ (1.22-1.52 m) with weights from 650-900 lb (295-408 kg). The Short-Faced Bear had an overall body length of roughly 6’9”-9’6” (2.06-2.9 m) and an upright standing height of 8’-12’ (2.5-3.66 m).

Series of side elevation illustrations of the Short-Faced Bear
The Short-Faced Bear (Arctodus sp.) is a genus of extinct bears that lived in North America from approximately 11,000 years earlier in the Pleistocene period. It was the earliest North American bear and the largest in California. The bear could run up to 40 miles an hour and scare off competition.

Male Short-Faced Bears had a shoulder height between 5’-6’ (1.52-1.83 m )and a weight in the range of 1750-2200 lb (794-998 kg). The shoulder heights of females were between 4’-5’ (1.22-1.52 m) with weights from 650-900 lb (295-408 kg). The Short-Faced Bear had an overall body length of roughly 6’9”-9’6” (2.06-2.9 m) and an upright standing height of 8’-12’ (2.5-3.66 m).

Series of side elevation illustrations of the Short-Faced Bear
Short-Faced Bear
Height:
4’-6’ | 1.22-1.83 m
Width:
Length:
6’9”-9’6” | 2.06-2.9 m
Depth:
Standing Height
8’-12’ | 2.5-3.66 m
Weight:
650-2200 lb | 295-998 kg
Area:

Males:

Height (Shoulder): 5’-6’ | 1.52-1.83 m

Length: 8’6”-9’6” | 2.6-2.9 m

Weight: 1750-2200 lb | 794-998 kg



Females:

Height (Shoulder): 4’-5’ | 1.22-1.52 m

Length: 6’9”-7’7” | 2.1-2.3 m

Weight: 650-900 lb | 295-408 kg

Scientific Name
Arctodus
Lifespan

Drawings include:

Short-Faced Bear side elevation (standing), front (standing upright)

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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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Tyrannosaurus | T-Rex
Tyrannosaurus | T-Rex size comparison to a human with dimensions for overall height and length

Tyrannosaurus Rex (T-Rex) was one of the largest predatory dinosaurs that ever existed. Living during the Cretaceous period (68-66 Mya) in the forested river valleys of today’s western North America, Tyrannosaurus is a carnivore popularly known for its large 5’ | 1.5 m skull, ferocious serrated teeth, small useless arms, strong tail, and powerful bipedal legs.

Tyrannosaurus Rex was 40’ (12.3 m) in length, with a height of 17’ (5.2 m), width of 6' (1.8 m), and hip height of 12’-13’ (3.7-4 m). Tyrannosaurus Rex weighed roughly 18,500-30,800 lb (8.4-14 metric tons).

Side, front, back and plan drawings of a Tyrannosaurus | T-Rex
Tyrannosaurus Rex (T-Rex) was one of the largest predatory dinosaurs that ever existed. Living during the Cretaceous period (68-66 Mya), Tyrannosaurus is a carnivore popularly known for its large skull, ferocious serrated teeth, small useless arms, strong tail, and powerful bipedal legs.

Tyrannosaurus Rex was 40’ (12.3 m) in length, with a height of 17’ (5.2 m), width of 6' (1.8 m), and hip height of 12’-13’ (3.7-4 m). Tyrannosaurus Rex weighed roughly 18,500-30,800 lb (8.4-14 metric tons).

Side, front, back and plan drawings of a Tyrannosaurus | T-Rex
Tyrannosaurus | T-Rex
Height:
17’ | 5.2 m
Width:
6’ | 1.8 m
Length:
40’ | 12.3 m
Depth:
Weight:
18,500-30,800 lb | 8.4-14 metric tons
Area:

Height (Hips): 12’-13’ | 3.7-4 m

Period: Cretaceous (68-66 million years ago)

Scientific Name
Tyrannosaurus

Drawings include:
Tyrannosaurus | T-Rex side elevation, front, back, plan

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