When you are trying to get wyvern eggs or milk it is alot easier to use a 150 pteranodon than to use a 150 argy just transfer a pteranodon from a differnet server this is because they are naturally fast so you dont need to pump all its stats into speed like you do with the argy you just need to upgrade its health also the pteranodon special attack will allow tou to escape quickly feom a wyvern if it is attacking you this is very helpful if a lighting wyvern is on your tail.
I got a level 150 lightning egg and I was so excited to hatch the egg...that when I went to put the egg down I accidentally ate it instead. :( ps4 users: R2 ISN'T GONNA DROP THE EGG YOU'RE GONNA EAT IT LIKE ANY OTHER EGG. REMEMBER THIS. LOGIC BEFORE EXCITMENT.