The body is black, the beak is yellow, and the body is more than twice as large as when it was a normal bird. Even the wings have become more powerful because of the mutation.

It can be seen from the fact that the mutant birds are all black, and their bodies are twice as large as those in their normal state.

Although their size has expanded, some of the characteristics of their bodies have not changed much.

The mutant birds in the building where the bees are hiding are none other than the mutant crows!

The living people hiding in the building were affected by the shrill and piercing cries of the mutant crows, and the moment they screamed, their positions were already exposed to the detection of the mutant crows!

Otherwise, the mutant crows would not be invulnerable, breaking through the windows made of tempered glass, breaking into waves and pouring into the buildings where the living were hiding.

In fact, they are a group of mutant crows that hunt mutant zombies for food.

Specially select zombies to attack.

Although they also eat zombies, they can eat human flesh and blood by eating human beings, which is several times greater than simply eating zombies!

Eating a human body is able to provide their bodies with a lot of evolutionary energy!

As for evolutionary energy, for mutants, it is something that every living creature has. They provide them with a very rich evolutionary energy by eating the flesh and blood of other creatures.

When the energy level of the mutant reaches a certain level. For example, the huge mutant scorpion, although it is full of poison, it also has a very pure and non-poisonous place.

That's the evolutionary muscle in their body!

It was the rampaging zombies that devoured those small white muscles in the body of the mutant scorpion!

These white muscles contain a very rich amount of energy, and after the mutant devours them, all aspects of the body's attributes will be greatly enhanced.

The Berserk Zombies have also gained a significant increase in combat power by devouring these white muscles.

From not being the opponent of the Troll Stone Statue at the beginning, to defeating the Troll Stone Statue later. These are all extremely powerful numerical improvements in all aspects brought by the berserk zombies after devouring the evolution muscle!

Devouring the Evolution Muscle can bring a very large benefit to the mutants. At the same time, the evolutionary energy contained in the evolutionary muscle energy is very terrifying, enough to raise the strength of the mutant to a terrifying level!

Of course, Evolutionary Muscle is only produced after the death of some very high-level mutants with strong strength.

Not found on some low-tier variants.

……

In fact, there is a reason why these mutant crows are flying this way.

Reason 1: That is, there are a large number of zombies in this area, and they want to eat these zombies in order to collect evolutionary energy.

Reason 2: Don't forget, although mutant zombies and mutant crows are two very different species. But they themselves belong to the category of mutants.

If zombies have the ability to detect the breath of a living person, why don't they have such an ability?

Therefore, because this street satisfies both of the above reasons, the mutant crow flock will target this place.

And use your voice skills to stimulate the survivors hiding inside the building and make them scream to better judge where they are.

After all, there are still quite a few buildings around here.

Although they are able to perceive the approximate location of the breath of the living like zombies. However, their detection range is only an approximate range.

It is not like Chu Lin's perception ability, the scarecrow's tentacle detection, accurately and unmistakably found the location of the target.

So when they rush here, they need to use their sonic abilities to force out where they are.

……

Now, under the piercing dense birdsong, except for the awakened people of the second rank and above, they were not affected by this demonic sound and shouted.

Not all of humanity was touched by the sound of the magic that passed through the hands that covered their ears and into their ears.

And this dense group of skills is released, and the effect is even more terrifying!

When this high-pitched birdsong enters your ears, it begins to travel into your brain and affect your vocal cords.

Even if you don't want to make a voice, under this deliberate ability, you will be stimulated and forced to shout.

The name of this ability is very simple and straightforward, it is called: the crow's call.

Of course, this ability can only be applied to humans below the second order, although the awakened people above the second order will also find this noise very ugly, when they are not forced to call out.

As for why the chirping of these crows can only have an effect on humans below the second order?

The answer is that the strength of this group of second crows is only the peak of the late second order!

That's right, the strength of this group of crows is all at the second-order level, and the crows with the highest strength are only the peak of the late second-order stage.

In fact, this is not the real strength of this group of crows.

It turned out that the overall strength level of these crow flocks was actually very high, and the number reached a terrifying tens of thousands.

Its scale is far from what it is now, and there are only more than a thousand left!

There are 10,000 crows, what a terrible number!

In addition, their previous average strength was all at the level of the middle of the third order, and their overall strength was even more terrifying. And the power of the Dark Raven King, the leader of the crow group, is even more unfathomable, and its strength has reached the peak of the incomparably powerful late fourth order!

From this, it can be seen that this army of crows, what a terrible existence they are!

Yet this flock of crows is so terrifying.

A flock of birds led by their leader, the Raven King.

Why did they end up in such a fate?

It all started five days ago.

Five days ago.

The Dark Raven King, whose strength was at the peak of the late Fourth Order, felt that its strength had reached the level of the lord level in this area, that is, Jiangcheng.

So, it began to target the zoo in Eto.

The zoo was originally a place used by humans to imprison animals for people to buy tickets to enter and watch and entertain.

But that's only before the end of the world!

When the apocalypse comes, after the zombie crisis breaks out, not only human beings have mutated, but also mutated zombies who have no reason and can't control themselves, and pounce on people when they see them!

This global crisis has arrived, and not only humans have been affected, but even animals have mutated and become bloodthirsty and belligerent mutants!

So, but at the moment of the outbreak of this global crisis, the entire Jiangcheng zoo was also affected by the crisis. The animals in the zoo are starting to change.

After the mutation, the mutated animals not only expanded their size a lot, but even their own strength and agility have improved to a terrifying realm!

It has to be said that the mutants produced in animals are not more than one or two times stronger than those produced in humans in all aspects.

Since they have been mutated, some of the animal strength has suddenly become second-order mutants.

From the very beginning, they were already far ahead of the starting line!

……