It is documented here on the wiki due to being officially-released content by Mojang Studios, even if not present in a final version.
16 × 8
Easy and Normal: 1
Height: 0.3 Blocks
When mining redstone ore
Redstone bugs can spawn if a redstone wire increases the strength. The chance that they spawn is 1%. The chance increases for every redstone bug in a 7x7x7 area by 5%. The
Color value of the bug can reach from
Redstone bugs, effectively being reskinned silverfish, shared all of their behavior.
|Name||Savegame ID||Numeric ID||Translation key|
Redstone bugs used the ID of silverfish, different from them only by a newly-added
Color NBT, which could have any color applied to it via editing. The first byte defines the alpha value and the other three the rgb color.
|2.0||Added the redstone bug.|
|3D Shareware v1.34||