The Army of Peepz collection provides a Peepz-rarity model. The model devide the owls into four different levels:
Rarity Level 3: Legendary ( 25 total )
Rarity Level 2: Epic ( 50 total )
Rarity Level 1: Rare ( 100 total )
Rarity Level 0: Common
Every Peepz above the "Rarity Level 0: Common" is a GIF with cool moving backgrounds that show the advanced value. They are all dropped before 50% of the planned total amount is minted.
Go and save them for your own awesome collection and give them a new home! Enjoy!