Thief Bug

Thief Bug is a Level 21 Insect monster in Ragnarok Online with the Neutral (Level 3) element and Small size. It has 238 HP and grants 188 base EXP. This page lists Thief Bug’s stats, item drops, and spawn data for Renewal servers.

Data updated 18 March 2026

Thief Bug Item Drops

• Worm Peeling — 30%
• Jacket — 0.4%
• Red Herb — 1.75%
• Jellopy — 10%
• Jacket — 0.6%
• Iron Ore — 1.25%
• Fly Wing — 5%
• Thief Bug Card — 0.2%

Where Thief Bug Spawns

• Prontera Culvert Floor 2 (prt_sewb2) — 70 spawned
• Prontera Field (prt_fild05) — 42 spawned
• Prontera Culvert Floor 1 (prt_sewb1) — 40 spawned
• Prontera Culvert Floor 4 (prt_sewb4) — 20 spawned
• Prontera Culvert Floor 3 (prt_sewb3) — 20 spawned
• Culvert (harboro2) — 10 spawned
• Rock Ridge Mine (rockmi1) — 10 spawned
• Gypsy Village (gef_fild05) — 10 spawned
• Kiwawa Desert (rockrdg2) — 10 spawned
• Kiwawa Desert (rockrdg1) — 10 spawned
• Underground Bunker (un_bunker) — 6 spawned