Zhang Jun spared a little way, returned to the dragon's den, along the way encountered several groups of herbivores, they saw the dragons automatically avoided the past, among them there is a kind of big dinosaur with a cockscomb like a crown, I don't know what kind of class, this kind of dinosaur legs are relatively thin and long, running is very powerful, and the speed is also very fast, faster than the ordinary Allosaurus, it seems to be a good runner.

Zhang Jun didn't have time to take care of these new dinosaur species, he went straight back to the dragon's den, because he had to start doing one thing, that is, active defense, today's performance of the evil dragon group and their huge number made him feel jealous, and he had to prepare in advance.

After returning to the dragon's den, it was already dark, and after staying cautiously until dawn the next day, Zhang Jun began to search around the top of the rock and in the surrounding jungle, taking the bald head and several other large male dragons, looking for stones of the right size, and then pushing them around the dragon's den.

Zhang Jun began to build a special kind of dragon nest, that is, to enclose the dragon's nest with stones, of course, this could not resist the attack of animals such as the strong bouncing power and the tree-climbing evil dragon, but it could delay their possible attack.

Zhang Jun took a lot of effort to force the dragon group to work with him, and only then did he push dozens of stones of different sizes around him to the vicinity of the dragon's nest, and he placed the stones in a position that was easy to push, facing the slope and on the left and right sides, and an area above the dragon's nest was also arranged by Zhang Jun.

In addition to the stones, Zhang Jun also broke off a lot of branches and piled them up around the dragon's nest to use as a barrier, and he selected hundreds of branches that could be used as wooden spears to use as weapons, and everything that could be used around him was used by him.

In addition, Zhang Jun also cut a large number of logs and piled them up on the periphery of the dragon's den, which can also be used as weapons. Soon a large number of trees in the surrounding mountains and forests were broken by Zhang Jun, many trees were uprooted, and many big trees became very sparse, in order to prevent the evil dragon from climbing the trees, Zhang Jun broke off the branches of the surrounding big trees, so that they could not jump into the dragon's nest through the branches.

In the end, Zhang Jun piled up stones in his cave and at the entrance of the cave of the little dragon next door, especially outside the cave of the little dragon, which was blocked tightly by him, almost completely sealing the entrance of the cave, leaving only the hole for ventilation, they are the most vulnerable to injury, and must be protected.

In addition, Zhang Jun arranged for a few male dragons to move the dragon's nest to the surrounding high terrain, where the field of vision is wide, it is easy to see distant targets, once there is an enemy situation, they can be found in advance, send out an early warning, the larger Allosaurus is very vigilant, they will automatically sentry, observe the enemy, and in case of danger, they will immediately send out a roar to notify their companions.

After a busy day, Zhang Jun finally built a super defensive fortress, which is unique in the Jurassic period, the only masterpiece of intelligent creatures, so that the dragons are relatively safe. When it was over, it was dark, and the second night was still very quiet, and the sentry dragons did not see any threat.

Early in the morning of the third day, Zhang Jun gathered several small dragons together and began to check their claws and palms to see if they could deliberately bend their forepaws to the point where they could grasp the branches of a tree like cultivating a bald head.

This point is barely achieved in the bald head, if possible, Zhang Jun wants to teach them a skill, that is, throwing a wooden spear into the distance, this action has only been imitated by the bald head before, but its skills are not good enough, it is obviously far worse than Zhang Jun, but maybe it is just a sudden act in a hurry, usually it will not do this, after all, this is a very difficult thing, it needs not only physical cooperation, but also needs thinking, thinking This kind of thing, not a day or two can be formed.

Zhang Jun's body and claws are flexible and flexible after long-term deliberate training, and the claws and palms of other Allosaurus are relatively hard, so it is difficult to grasp the wooden spear, and it is even more difficult to make them throw the wooden spear.

After hearing the call of the leader's brother, the bald head jumped up and down to Zhang Jun's side, and let out a few squeaks, and Big Al and Little Al also came over with the other five little dragons, and several little dragons followed Zhang Jun to eat and drink, and they looked fat and cute.

These little guys usually like to frolic when they gather together, they are pushing and chasing each other, a little dragon is still grabbing the bald tail and wagging around, it seems to be fun, the bald head raised his hind legs, and gently kicked the little dragon, the little dragon was so frightened that he immediately jumped out of the back, but when he found that the bald brother who was the head of the little dragon's head was just joking, he immediately came over and played with the bald head.

Big Al and Little Al have grown to four meters long at this time, bald heads have only grown to three meters long, and the rest of the little dragons are less than two meters long, it takes about seven or eight years for them to grow up, almost only about one meter per year, and they will grow faster after more than five years, which is also related to the amount of food, eating more may be an adult in advance, and it is also possible to grow into the largest dinosaur within five years.

After Zhang Jun let out a low roar, several little dragons stopped playing, they knew that the leader brother was usually very kind to them, but once they became serious, it was very serious, if they were disobedient, they would be punished, and sometimes they would not be allowed to eat meat, which was the biggest blow to them, they were very afraid of starvation.

Zhang Jun casually pulled a branch and used it as a whip, a little dragon was naughtily touching the butt of another female surnamed Xiaolong, and suddenly Zhang Jun stretched out the whip and whipped his claws, and immediately screamed in pain and took back Yindang's claws.

"Now watch me perform." Zhang Jun didn't care if Xiaolong could understand it or not, and screamed a few times.

Then Zhang Jun began to pick up another branch on the ground, about two meters long, held it in his hand, and then aimed it in the direction of a non-Allosaurus, he squatted down a little with his hind legs in a decent manner, and put on the standard bidding gun pose taught by the physical education teacher.

Then Zhang Jun lifted the branch to shoulder height, pulled his right forelimb back some distance, and then began to throw the wooden spear, a movement he had practiced for more than a year, so he was very skillful, and as his right forelimb slammed forward, a strong force pushed the wooden spear to begin to come out of his hand.

Zhang Jun's strength is very great, many times greater than that of a person, so the branch is as thick as a person's arm, this branch flew along an approximate straight line, towards a big tree dozens of meters away, like an arrow from the string, directly shot into the trunk of a big tree, the sharp head pierced into the trunk, into the tree for three points, the root of the branch is still shaking on the trunk.