Items, NPCs, quests, objects and spells of patch 1.12.1, read live from the realm itself.

Bug Eye

NPC	Level	Zone	Chance
Young Night Web Spider	2 - 3	Tirisfal Glades	39.1%
Webwood Spider	3 - 4	Teldrassil	38.3%
Night Web Spider	3 - 4	Tirisfal Glades	37.2%
Githyiss the Vile	5	Teldrassil	36.9%
Night Web Matriarch	5	Tirisfal Glades	35.5%
Scorpid Worker	3	Durotar	26.0%
Sarkoth	4	Durotar	25.2%