Since he didn't find that he had a mother to rely on, Zhang Jun had to survive on his own, and he had the idea of gathering the dinosaurs just now to resist the danger, but he understood that these guys were not smart enough, and pulling them together would make it easier to expose themselves, so after thinking about it, he still planned to stay alone for a while.

Zhang Jun continued to squat at the entrance of the cave for a while, watching several companions walk over one after another, and did not make a sound to greet them. Soon, Zhang Jun found that a small insect crawled near the entrance of the cave, it was a dark brown insect, it was actually a cockroach, and its shape was not much different from that of modern cockroaches, but the color was closer to the color of the dead leaves on the jungle ground.

"Xiaoqiang, your vitality is so strong, you have lived for hundreds of millions of years." Zhang Jun shook his head and sighed secretly.

Zhang Jun was so hungry that he felt disgusted when he saw the cockroaches in the kitchen in later life, but now he wanted to catch and eat this guy, but he still held back, and waited to see if there was any better prey, and this guy couldn't satisfy his appetite if he ate it.

Zhang Jun decided to hide at the entrance of the cave and wait for the rabbit to see if there were any more advanced small animals passing by, so he began to lie at the entrance of the cave, only showing his eyes and looking around, and his nose was also carefully sniffing the surrounding smells.

Soon, there were a few crisp screams in the sky, and Zhang Jun looked up and saw that a big bird with yellow and black feathers suddenly flew over the jungle.

"Archaeopteryx!" Zhang Jun recognized it, this should be an archaeopteryx.

Archaeopteryx is very different from the pterosaurs that dominated the sky during this period, they are closer to modern birds, they can be as big as sparrows, or as large as eagles, they are also carnivorous animals, feeding on small reptiles and insects in the jungle, and there is not much threat to Zhang Jun, because his body size at this time is not much different from Archaeopteryx, and his weight is several times heavier than that of Archaeopteryx.

The biggest threat in the sky comes from the pterosaur, which can span more than ten meters, weighs more than an adult man, has sharp teeth, and can prey on small animals.

However, although the wings of pterosaurs can be folded, they cannot land in the jungle where only a small area of ground is exposed, because their huge wings need a larger space to flapp, so large pterosaurs will not enter the dense forest to hunt, and their predation grounds should be in a relatively open area.

Zhang Jun is most worried about his own kind, those relatively young carnivorous dinosaurs, they are not very big, their bodies can squeeze into this jungle to search for prey, in this era of the jungle, cannibalism is too easy to see, so Zhang Jun must beware of them.

After observing patiently for about an hour, Zhang Jun finally found that in this jungle, there was an animal that he was very familiar with, that is, a snake, and what came into his eyes was a green snake with a body length of about two meters, with shiny green round scales, it was swimming in the grass, probably also came out to forage.

According to the memory of science and education films, Zhang Jun knew that the appearance of poisonous snakes among snakes was more than 100 million years later, and the primitive snakes at this time did not evolve venom at all, so Zhang Jun did not have to be afraid at all.

Snakes are close relatives of lizards, lizards have appeared 100 million years ago, are one of the first land reptiles, after the limbs of the lizard degenerate, they become snakes, and the two animals hunt in a similar way.

"I'll fill your stomach first." Zhang Jun finally waited for an opportunity, how could he give up easily, he began to get excited.

After continuing to lurk for more than half a minute, the green snake was only more than five meters away from Zhang Jun, Zhang Jun listened carefully to the movement of the ground, and did not find other larger animals nearby, so he carefully pushed away the stones at the entrance of the cave, turned his head and looked around a few times, and found that there was indeed no danger, and immediately slowly crawled out of the hole, and then kicked the ground with his hind legs, and jumped out suddenly.

Zhang Jun found that his bouncing power was good, and he jumped out more than a meter away with this jump, and then rushed forward a few steps with an acceleration, and in less than a second, he landed next to the green snake's body, and the green snake had not yet reacted.

When the green snake found that the danger was suddenly coming, he immediately turned his head and raised his neck, and the bright red snake core in the flattened head immediately spit out, hissing, and warned Zhang Jun, but Zhang Jun of course knew its bottom and was not afraid at all, so he immediately clawed out and grabbed it.

The green snake twisted its body a few times and wanted to struggle, but Zhang Jun knew the weakness of the snake, and immediately found an opportunity, pecked it with his mouth, picked up the snake's tail, and then shook it a few times, and the snake went limp, and then he quickly grabbed its seven inches with his claws, so that it could not move immediately.

After quickly completing these few actions, Zhang Jun looked around for the first time, and found no danger, but he didn't dare to stay for a long time, so he immediately returned to the cave, and then sealed the entrance of the cave again, leaving a ray of light to eat.

Zhang Jun was so hungry that he didn't care about thirty-seven twenty-one, and soon after killing the green snake, he bit it with a big mouth, and he found that his teeth were indestructible, even the belt flesh and bones, which were quickly bitten by him and swallowed it with gusto.

"I'm finally full!" This snake weighs one or two pounds, for Zhang Jun's size, it can already fill his stomach, after eating, he lies on the ground comfortably, slowly digesting the energy of the green snake, and his body feels full.

The diet rules of ancient creatures are very different from each other, and many of them are overeating, that is, they eat enough at one time, and then they don't have to eat again for a while, so Zhang Jun will definitely not die of hunger in the past few days.

This snake has enough blood in its body, so it has a lot of water, and the surname has also replenished enough water at one time, Zhang Jun decided to stay in the cave for the next few days and not go out, to see what dangerous monsters will pass by, remember their infestation rules and numbers, and prepare for their future holes.

The skies here are slightly cloudy, and the climate is drier than in the early Jurassic era, but the area where Zhang Jun is located is still warm and humid, with plenty of food, and it is clear that there are many more animals living in it than in the arid deserts elsewhere.

Zhang Jun has been squatting at the entrance of the cave to observe the sunset, at night, he completely covered the entrance of the cave with soil, only inserted a finger-thick hollow straw tube exposed to the outside for ventilation, and then gradually began to sleep, rest assured and bold to sleep until dawn.

After the sun came out the next day, Zhang Jun didn't plan to go out, so he began to lie on the ground and try to exercise.

Therefore, Zhang Jun began to try to run the heart mantra of the Yi Jin Jing and practice gong luck in the body, but he soon found that the tendons and veins of the dinosaur were quite different from the human body, so he had to modify the path of the gong according to his own perception, which had made the operation of qi and blood achieve the best effect.

Fortunately, Zhang Jun found that the exercises he had practiced before could still be used, although he spent a lot of effort pondering, he still quickly found some cultivation methods, and he could use the method of tuna luck to practice, which was very important to him.

Zhang Jun himself is a carnivorous dinosaur, and he was born with a body size of half a meter, which proves that when he grows up, he must be a huge dinosaur.

In the late Jurassic period, Zhang Jun only thought of a dinosaur that matched his characteristics, that is, Allosaurus with a body size of more than ten meters long, weighing several tons, and a large brain capacity.

Allosaurus is a large terrestrial carnivorous dinosaur that appeared before Tyrannosaurus rex, slightly smaller in size than Tyrannosaurus rex, but with thicker forelegs and sharper claws, and they are likely to be social animals, with high intelligence, collective predation, so it is a very successful dinosaur, and it is also a dinosaur standing at the top of the food chain.

Compared with his body type, Zhang Jun felt that he was very similar to Allosaurus, so he temporarily decided that he was an Allosaurus, but he also understood that it would take about ten years for an Allosaurus to grow up before it could reach a weight of more than three tons, and he still had a long way to go.

Prior to this, Zhang Jun was small in size and faced more natural enemies, so he had to rely on cultivation to improve his strength. Fortunately, he was a man in his previous life, and his wisdom was superb, even if this era was extremely dangerous, his chances of survival were much greater than those of other kinds.