You need an Argentavis 200% speed or more to outrun wyverns. Remember whips can pick things up, If you use them correctly it will be faster to get the egg and run! Enjoy! You also might want to get better than primitive crossbow or longneck to knock one out.
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.