Aggro and kite the snake into a generally safe area flying an Argent. Hover over the snake just out of reach and drop the fertilized eggs from your personal inventory. Then kite the snake back to the egg if necessary being wary of the 20 sec. Timer between eggs.
Knock out it then place wooden spike walls around it then drop fertilized egg near the snake. When it will woke up, it will consume all the eggs and become yours. Please tap the good button to bring me happyand others can also see this tip.
You tame them by droping ferti eggs from your inv on the ground. You need to do so when the snake is not aggroed, so sit on a rex or smthing it wont attack. Be sure to drop them from your inventory, not from dino ones, that will make it bugged, it wont eat. To a lvl 20 Rex egg gives 29% on 2x event, bronto 26.7% and giga and wyvern the same, looks like all the big eggs give approxymately the same amount.. so dont waste the best you have ? If they get aggroed on you just run away and return, taming wont drop. Happy taming!