Requiem flying squid

From Halopedia, the Halo wiki

This article contains information about a non-canonical subject that, while official, is not part of the established Halo universe.
Image of the cut flying squid from Halo 4.
The "flying squid" on Requiem.

This flying squid was an alien lifeform living in the jungles of Requiem. It was to be prominently featured as ambient life in Halo 4 during the level Infinity, but the idea was cut before the game's release. It can be seen in various concept art[1] and in the Halo 4 E3 2012 demo build.[2] The concepts had mostly been drawn by Nicolas Bouvier and Paul Richards.