There are 5 unique codex entries in the Species section on Tatooine. They are accessible to all players regardless of class or faction.
Gamorrean is obtained from interacting with a Clickable Crate.
Codex type: Species | Faction: Both | Class: All
Associated Achievement: None
Geonosian is obtained from interacting with a Clickable Toolbox. It can also be obtained from killing Geonosian Grenadier, Geonosian Swarmer, Geonosian Trooper, Mutated Geonosian Berserker, Mutated Geonosian Juggernaut, or Mutated Geonosian Medic on Ossus.
Codex type: Species | Faction: Both | Class: All
Associated Achievement: None
Jawa is obtained from interacting with a Clickable Junk.
Codex type: Species | Faction: Both | Class: All
Associated Achievement: None
Rakata is obtained from interacting with the Ancient Machine during "The Thing Czerka Found" mission.
Codex type: Species | Faction: Both | Class: All
Associated Achievement: None
Sand People is obtained from speaking with Tre Nareves during "Goodwill" mission or interacting with a Clickable Basket. It can also be obtained from killing Captured Sand People Savage or Captured Sand People Enforcer in the Tatooine Star Fortress.
Codex type: Species | Faction: Both | Class: All
Associated Achievement: None