From Halopedia, the Halo wiki
A fleg is a kind of small insect-like animal known to the Sangheili. During the conflict on Netherop in 2559, Worldmaster Nizat 'Kvarosee unfavourably compared the act of using the Divine Hand to destroy a handful of communications satellites to the act of swatting flegs out of the sky. Later in the engagement, Arbiter Thel 'Vadam wondered whether Crei 'Ayomuu had used a spy fleg to track 'Kvarosee and the Defenders of the Sanctum without his consent; though the Oath Warden had instead used a tracking tetht planted on Rosa Fuertes.
List of appearances
- Halo: Outcasts (First mentioned)
- Halo: Outcasts, chapter 10
- Halo: Outcasts, chapter 14