User blog comment:Adsper/All Possible Mobs/@comment-75.111.239.208-20180619032536/@comment-2001:5B0:45C6:8C60:0:FF:FEBF:47C0-20180624172143

Actually, that's not true. A large bone bed in Argentina held many individual specimens of Mapusaurus, showing many different ages and sizes. There were no other animals of this concentration in the bone bed as well, which could mean that it was a pack.