Bonta Beadda

Where can I find this mofo? I searched through Expeditions and ARKS quests on various difficulties in both Daybreak and Nightfall and nothing. Is it maybe a rare miniboss?

Easiest place to find them is the Harukotan Time Attack Quest since that quest has set enemies. 2 Bonta Beaddas spawn there (they are the teddy bear Toy-type Falspawn with boxes for ears).