Animal Habitat
From Halopedia, the Halo wiki
Animal Habitat
Animal Habitat is an achievement in Halo: The Master Chief Collection. This achievement is obtained by spotting the hippo on the walls of Headlong in classic multiplayer.
Numerous hippos can be found on the walls of the structure under construction in the center of the map. Viewing any one of these hippos will unlock the achievement. The achievement is worth 5 Gamerscore.