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.

What causes animals to go extinct?

The factors that cause animals to go extinct are mainly the loss and degradation of habitat which is mainly due to deforestation. Other causes for animals going extinct are exploitation through hunting and overfishing, invasive species, and climate change. Plastic pollution and emerging diseases are also factors that play a role in the extinction of animals.

Can extinct animals be brought back?

Extinct animals have not successfully been brought back as of today. Scientists need to sequence its genome and then edit the DNA of a close living relative to match it. Afterwards, they would need to make embryos with the revised genome and have a surrogate mother carry them.

Which animals have gone extinct because of climate change?

Animals that have gone extinct because of climate change include the golden toad and the north Atlantic cod is threatened. The staghorn coral and orange-spotted filefish have also had their population numbers affected by the effects of climate change. It is up to humans to make the necessary changes and help endangered animal species.

* Under Development *

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Extinct Animals Guides
Browse through our curated Extinct Animals Guides for additional categorizations, tips, details, variations, styles, and histories of Extinct Animals. Guides provide additional insights into the unique properties and shared relationships between elements.
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5'6" | 1.67 m
16' | 4.85 m
Ankylosaurus
167.000
485.000
66000
3D
Ankylosaurus
Baiji
19800
11”-20” | 27-52 cm
13”-24” | 32-61 cm
4.5’-8.5’ | 1.37-2.59 m
287-375 lb | 130-170 kg
24-30 years
Baiji
52.000
61.000
259.000
170.000
30.00
19800
3D
Baiji
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
4.25’-4.58’ | 1.3-1.4 m
2.4’-2.5’ | .73-.76 m
5.58’-5.91’ | 1.7-1.8 m
440-550 lb | 200-250 kg
68 years (minimum)
Cyprus Dwarf Elephant
140.000
76.000
180.000
250.000
68.00
70
3D
Cyprus Dwarf Elephant
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
63”-67” | 160-170 cm
17.7”-19.3” | 45-49 cm
198-220 lb | 90-100 kg
Kumimanu
170.000
49.000
100.000
750
3D
Kumimanu
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
Quagga
102300
53.1”-57” | 135-145 cm
65”-70.9” | 165-180 cm
551-661 lb | 250-300 kg
20-40 years
Quagga
145.000
180.000
300.000
40.00
102300
3D
Quagga
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
6.5’-7.4’ | 200-225 cm
6.5’-7.4’ | 200-225 cm
26’-30’ | 7.9-9.1 m
16,000-20,000 lb | 7,260-9,070 kg
50-80 years
Steller's Sea Cow
225.000
225.000
910.000
9070.000
80.00
4700
3D
Steller's Sea Cow
Tarpan
27100
54.3”-59.8” | 138-152 cm
70.9”-78.7” | 180-200 cm
661-882 lb | 300-400 kg
25-30 years
Tarpan
152.000
200.000
400.000
30.00
27100
3D
Tarpan
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
25”-39” | 65-100 cm
6.3”-10.2” | 16-26 cm
22-66 lb | 10-30 kg
Waimanu
100.000
26.000
30.000
540
3D
Waimanu
8.5’-11.17’ | 2.6-3.4 m
4.59’-6.23’ | 1.4-1.9 m
9.19’-12.47’ | 2.8-3.8 m
13,205-17,593 lb | 5,990-7,980 kg
60-80 years
Woolly Mammoth
340.000
190.000
380.000
7980.000
80.00
146900
3D
Woolly Mammoth
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
Lifespan

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

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Tarpan (Equus ferus ferus)
Dimensioned comparison drawing of the Tarpan compared to an average person

The Tarpan (Equus ferus ferus) also known as Eurasian wild horse was a subspecies of the wild horse that is now extinct. They had a gray coat with a pale underside and a stripe on their back. They also had small ears. The tarpan was native to Russia, but was known to roam all throughout Europe. In the mid-1800s farmers killed them as they were believed to be pests and the last tarpan died in 1909. There have been attempts to ‘breed back’ the tarpan which have resulted in the modern Tarpan that is now referred to as the Heck Horse.

Tarpans have a shoulder height between 48”–52” (122-132 cm), overall standing height of 54.3”-59.8” (138-152 cm), and body length of 70.9”-78.7” (180-200 cm). The weight of a Tarpan is between 661-882 lb (300-400 kg). Tarpans have a typical lifespan of 25-30 years.

Set of standing side elevation drawings of the Tarpan with measurements
The Tarpan (Equus ferus ferus) also known as Eurasian wild horse was a subspecies of the wild horse that is now extinct. They had a gray coat with a pale underside and a stripe on their back. They also had small ears. The tarpan was native to Russia, but was known to roam all throughout Europe.

Tarpans have a shoulder height between 48”–52” (122-132 cm), overall standing height of 54.3”-59.8” (138-152 cm), and body length of 70.9”-78.7” (180-200 cm). The weight of a Tarpan is between 661-882 lb (300-400 kg). Tarpans have a typical lifespan of 25-30 years.

Set of standing side elevation drawings of the Tarpan with measurements
Tarpan (Equus ferus ferus)
Height:
54.3”-59.8” | 138-152 cm
Width:
Length:
70.9”-78.7” | 180-200 cm
Depth:
Withers Height
48”–52” | 122-132 cm
Weight:
661-882 lb | 300-400 kg
Area:
Scientific Name
Equus ferus ferus
Lifespan
25-30 years

Drawings include:

Tarpan side elevation (assorted), front, back

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Ankylosaurus

The Ankylosaurus had an overall length of 16' (4.85 m) and a standing height of 5'6" (1.67 m).

Size comparison of an Ankylosaurus and a human with dimensions

The Ankylosaurus had an overall length of 16' (4.85 m) and a standing height of 5'6" (1.67 m).

Size comparison of an Ankylosaurus and a human with dimensions
Ankylosaurus
Height:
5'6" | 1.67 m
Width:
Length:
16' | 4.85 m
Depth:
Weight:
Area:
Scientific Name
Ankylosauridae
Lifespan
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Spinosaurus
Comparison drawing of a Spinosaurus and a human with dimensions for height and length

Spinosaurus was a large carnivorous Cretaceous period (112-93.5 Mya) dinosaur characterized by its large thin back spikes. A giant predator on both land and water, similar to the present day crocodile, fossils prove that the Spinosaurus was as larger or larger than the Tyrannosaurus Rex.

Spinosaurus had a length of 49’-51’ (15-15.6 m), a head height of 16.5’ (5 m), an overall spine height of 21.5’ (6.5 m), and a width of 5.7' (1.7 m). Spinosaurus weighed 14,100-15,900 lb (6.4-7.2 metric tons).

Collection of drawings of a Spinosaurus from the front, back, side and plan views
Spinosaurus was a large carnivorous Cretaceous period dinosaur characterized by its large thin back spikes.

Spinosaurus had a length of 49’-51’ (15-15.6 m), a head height of 16.5’ (5 m), an overall spine height of 21.5’ (6.5 m), and a width of 5.7' (1.7 m). Spinosaurus weighed 14,100-15,900 lb (6.4-7.2 metric tons).

Collection of drawings of a Spinosaurus from the front, back, side and plan views
Spinosaurus
Height:
21.5’ | 6.5 m
Width:
5.7’ | 1.7 m
Length:
49’-51’ | 15-15.6 m
Depth:
Weight:
14,100-15,900 lb | 6.4-7.2 metric tons
Area:

Height (Head): 16.5’ | 5 m

Period: Cretaceous (112-93.5 million years ago)
Scientific Name: Spinosaurus

Scientific Name
Lifespan

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

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Pterodactyl

The Pterodactyl had a wingspan of roughly 19.5' (6 m) and a body length of 6' (1.83 m).

Drawing comparing the dimensions and size of a Pterodactyl to a man showing height and length

The Pterodactyl had a wingspan of roughly 19.5' (6 m) and a body length of 6' (1.83 m).

Drawing comparing the dimensions and size of a Pterodactyl to a man showing height and length
Pterodactyl
Height:
Width:
19.5' | 6 m
Length:
6' | 1.83 m
Depth:
Weight:
Area:
Scientific Name
Pterodactylus
Lifespan
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