Minecraft wiki entry for Illager, associated text: Illager structures are always themed around dark oak wood.
All illagers' eyes are green‌[BE & EE only] with the exception of vindicators,‌[JE only] which have blue eyes. In the Texture Update, vindicators and illusioners were changed have to green eyes, but in the Java snapshot 18w47b and Bedrock beta 1.18.0.22 the color of the vindicator's eyes was turned to blue again. However in Minecraft Dungeons both vindicator, pillager and ominous banner's eyes are blue.
For the Minecon mob vote of 2020, there was a candidate to add in the Iceologer, an Illager from Minecraft Dungeons. However, it was eliminated in the 2nd round, surpassing the Moobloom but beaten by the Glow Squid.
Witches allied with the illagers during raids. Cory Scheviak jokingly explained that witches spawn in raids are just along for the ride.[6]
According to Minecraft Mobestiary, illagers were "expelled" from villages due to their "unspeakable activities".