10 Dangerous Prehistoric Birds

The ancient times were completely different from today, and there have been a lot of various speculation about the birds and the animals that were present then. It is said that most of the animals and the birds of the prehistoric times were big. All these birds were predators and carnivores. We are lucky that these birds are not alive now or it would have been a challenge living in a world with these creatures. These prehistoric birds were so big that the humans of today’s time are mere of the size of ants in front of them.

Below you will see a list of the top 10 Dangerous Prehistoric Birds that roamed the earth in the older times. The first thing to note here is that none of these birds are alive. The only information that we have about them is from the fossils and the various evidence that we have dug out while researching. Many of these birds can be seen in science museums and attract a lot of visitors from all over the world. If you want to know about the most dangerous prehistoric birds and how they ruled the planet, here is a list that should go through.

10 Dangerous Prehistoric Birds

10. Pelagornis Sandersi

Pelagornis Sandersi - dangerous prehistoric birds

The largest and one of the most Dangerous Prehistoric Birds is the Pelagornis sandersi. This was the largest flying bird that lived in this world, and its wingspan was measured no less than 24 feet. The fossils of this bird show that it was a predator and an excellent glider. It caught its preys in the sea, and its wings kept it in the air no matter its gigantic size. The beak of this bird had teeth like spikes that helped it pierce the body of the prey to kill it.


Argentavis - dangerous prehistoric birds

The second largest flying bird of all time and one of the most Dangerous Prehistoric Birds is the Argentavis. This bird had a wingspan of 16.7 to 19.9 feet. The bird is also known as the giant teratorn. The fossils of this species were recovered from central and northwestern Argentina. This bird was a scavenger, and its hunting techniques were extremely fierce. While hunting it used to catch its prey and swallow it in mid-air. There was no tearing of the flesh of the prey before devouring it.

8. Titanis

Titanis - dangerous prehistoric birds

Titanis is number 3 on the list of the most Dangerous Prehistoric Birds. It was a flightless bird that stood 8.2 feet tall from the ground. The bird was carnivorous and belonged to North America. The fossil of the skull of this bird has not yet been found hence its head is estimated to be large with an ax like a beak. The bird had long and strong legs that helped him run after the prey and catch them. It usually attacked the head or the neck of the prey to kill him instantly.

7. Phorusrhacos

Phorusrhacos - dangerous prehistoric birds

Another one of the Dangerous Prehistoric Birds is the Phorusrhacos. This was also a flightless bird with long and strong legs. The beak of the bird was hooked, and the skull was huge. The bird grew up to the size of 8.2 feet and would have weighed up to 130 kg. The bird was carnivorous and used the beak to primarily kill the prey. It killed the prey by either picking and hitting on the ground or striking his head with the beak and killing it.

6. Physornis


Another one of the Dangerous Prehistoric Birds that was flightless yet dangerous is the Physornis. This bird grew up to the size of 6.5 feet and had a huge head and crooked beak. The legs of the bird composed most of the part of its body and helped him run fast to catch its prey. The bird was found in Argentina and is the earliest terror birds.

5. Pelagornis Chilensis

Pelagornis Chilensis - dangerous prehistoric birds

With a wingspan of 17 feet, the Pelagornis Chilensis is the next in our list of the most Dangerous Prehistoric Birds. This bird belongs to the group of the bony toot birds that hunted mainly in the ocean. The false tooth of the bird helped him catch the prey such as fishes and squids from the water. They then swallowed them directly without chewing or tearing them.

4. Haast’s eagle

Haast’s eagle - dangerous prehistoric birds

Eagles are scary in today’s times, and the Haast’s eagle was even bigger. The wingspan of this bird was 8.5 to 9 feet and is said to have lived in the New Eland. The eagle is known to have preyed on the flightless bird species and could even kill an animal which was 15 times their weight. Its hunting techniques were fierce, and it killed the prey in just one blow.

3. Teratornis

Teratornis - dangerous prehistoric birds

Teratornis was one of the most Dangerous Prehistoric Birds that could hunt the creatures up to the size of a mouse or a rabbit. It did not bite or chew them but directly swallowed them whole. This was a bird that could fly, and its wingspan ranged anywhere from 11 to 12 feet. The fossils of this bird have been found in many areas of California, Arizona, Oregon and Florida. The total height of this bird was about 30 inches from the ground.

2. Kelenken

Kelenken - dangerous prehistoric birds

Another one of the most Dangerous Prehistoric Birds is the Kelenken. This was one of the largest terror birds of that time. The bird reached up to a height of 9.84 feet and could not fly. It had thick and long legs that helped it chase the prey and kill him. The beak of the bird was crooked at the tip to hit the prey and break their bines. The bird had a massive 28.2 inches head, and its beak was 45.7 cm long from the tip to the base.

1. Brontornis

Brontornis - dangerous prehistoric birds

One of the largest and the most Dangerous Prehistoric Birds was the Brontornis. This was a flightless bird that grew up to 9.3 feet tall. The bird initially lived in Patagonia. It might have been over 300- 400 kg in weight. This makes it the third heaviest bird is ever known to man. The bird was easily able to kill really large animals such as elephants and much more. Because of its big size, it was not able to run really fast but it hunted the prey by hiding and poaching.


Most of the birds in the prehistoric times were predators and killed to live. They were huge in sizes and of were usually flightless. We still have the predecessors of these birds in the world. However, they are smaller in size than and not as scary as the ones we have mentioned above.

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