You'll start at an 'oasis', in which you've finished the previous stage. You won't be attacked by anything at the beginning, just follow Carl all the time. By walking through the natural (rock) bridge, you'll reach a place where you'll hear Ann's screaming. Move through the tall grass...
...to reach a spectacular spot. You'll see dinosaurs fleeing in fear, and then Kong walking.
After Carl finishes shooting the scene with the gorilla, he'll show you which way to go next. Follow him (get to a place where you'll have to go through a split in the rock).
You'll walk up to an old, destroyed alley with stairs. Go through it and get ready for the first fight in this (a little further on) hard stage.
You'll reach an area with flying creatures and their 'mother' - bigger and stronger individual. That's the creature that'll attack and kidnap your camera man. Your task is saving him, but not on sight. By throwing spears at it you won't accomplish anything. You can help him a little further on from here. Take care of yourself for now and kill all the creatures (two smaller ones) by using spears or bones (right picture).
After that, move on. Walk along the semicircular path downwards and pass by the gate (right picture - you can't open it now, you need Carl to do it) and the waterfall - light up a spear at the fireplace.
You'll approach an entrance to a tunnel which is blocked with wood - knock it down and make it passable.
After you get out of the tunnel, walk up to a scarp from which you can see kidnapped earlier companion. Move on the path and walk up onto a higher shelf and fight. You'll be attacked by a couple of smaller dinosaurs (they'll come in pairs, although the second pair can come earlier). Kill them with the spear and bones that lie there. Hurl the spear at the last moment, when the creature will be face to face with you, and take the spear out quickly from its body and hurl it at the next one (the creatures won't wait, and unnecessary walking around and looking for weapons will end with your death).
After getting rid of the dinosaurs from two mountain shelves, go towards the top of the elevation, and through another tunnel.
There will be a couple of flying creatures at the end of it. Right after you walk out of the tunnel, you'll be attacked by two (simultaneously). Try not to throw your spear at the beginning, just stab and wait for the right moment. After the first throw (which better be accurate) retreat back to the tunnel. Once the second creature flies away a short distance, run out into its range, pick up the bones lying there and kill him also.
Then, move a little further on and cross the wooden construction which will shake once you step on it (you can easily fall down, so be very careful). Once you'll be standing on the ground again, you'll be attacked immediately by two more 'birds'. You can kill them with spears that are embedded in the ground nearby (if you throw it accurately and the creature won't die, quickly run to the side and try not to get wounded - pick up a new spear and attack again). When you've finished, go upwards into the tunnel.
Once you're out of the tunnel, you'll reach the cumulative spot on the map, the nest. There will be swarms of flying creatures far away and the mother that kidnapped Carl, but you don't have to worry about them, since you will be attacked from a different spot.
Now, your task is going to eliminate the nearby foes (two of them). They'll be flying above the path (left picture). To kill them, quickly run about half way from them (orange arrow). There will be three spears and bones there, use them to kill the creatures. After throwing, immediately run into the tunnel from which you came out and repeat the process again. Trying to kill them with 'one assault' will most probably end in failure. There will be a crate with 10 shotgun shells hanging on a parachute (red arrow) at the end of the path. Take the ammo and move on.
Walk through another wooden footbridge, and then through thick grass all the way to the top, to the nest.
There you will see Carl being attacked by a swarm of monsters. Shooting at one will make them all come at you. Kill them with your firearms, but don't waste too much ammo - shoot only when they're close. After defeating the first wave of creatures, the mother will attack. She is quite strong and needs a larger amount of lead. Pull the trigger only when she is near you (she will come near you after a while of flying around). After an accurate shot, she will move back and attack again. You have to shoot her with about for accurate 'full' shots.
If you run out of ammo, there will be a crate nearby (where you're fighting), but this time with ammunition for the smaller pistol.
Carl is saved, and to finish the stage you have to return to the gate you've passed by earlier.
You'll be attacked near the first wooden construction, but now having the pistol, fighting shouldn't be hard (instead of going through the 'scaffold' again, go through the footbridge - right picture).
In the spot where you were attacked by a couple of smaller dinosaurs, you'll be attacked again by reptiles (two) which will die from one shot :).
At last, you'll reach the gate and open it with the help of the companion and go to a building similar to the one in the previous stage.