Which Assassin's Creed game introduced the playable eagle Senu?

Assassin's Creed Origins introduced the playable eagle Senu.

Senu is Bayek's trained eagle and provides an aerial perspective over the Egyptian world. By controlling Senu, players can scout locations, identify enemies, mark objectives, and locate points of interest before Bayek enters an area. This reconnaissance system became one of Origins' distinctive gameplay features.

Senu also reflects Bayek's relationship with the natural environment. Origins gives animals and landscapes an important role, and the eagle's viewpoint helps connect exploration with stealth planning. Senu does not replace Bayek as the protagonist; she is a scouting companion controlled during specific aerial sequences.

Later games developed similar bird-assisted reconnaissance systems. Odyssey uses Ikaros, Valhalla uses Synin, and Mirage uses Enkidu. Those names belong to different protagonists and settings, so Senu is specifically linked to Bayek's Egyptian adventure in Origins.