With a glide, hazard suit, about 15-20 climbing picks, 2 water jars and 40 cooked meat you can do it.
jump of from a good height in fertile forest and glide all the way down to the spine (the big metal thing going down) once you reach one of the lower metal circle things you can land if you like (or keep going if you are familiar) at that point locate the giga skull and glide to HIS left, following a little the stream and into the nest path that will be on YOUR right.
Glide there looking for an egg on a HIGH nest, land, grab and jump. Follow the pathway back as the creatures will be swarming you but wont hit you if you dont get terrible luck and didnt wait after grabbing the egg.
Once you get out of the cave (gliding) go to your left following the river straight to the base of the spine. Once there you are relatively safe and can do your long climb up.
Once at top or near it you can jump and glide through all bioluminescent right to the fertile lands.
They lose 1 point of food every 15 seconds, so to time how long until they start starving, multiply their current amount of food by 15 and then divide by 60 twice. This will give you the number of hours left untill the food stat reaches 0.
((15 x food)÷60)÷60
Obtaining this creature will require you to enter the tek trench where puprle liquid and the nests of these creatures lay past the bioluminescent chamber, there you must steal an egg and raise in a cold environment feeding it nameless venom you can get by killing nameless