FFXIDB Tracking Data
151,713,533 Kills
680,586 Voidwatch Chests
84,094 Monster Spawns
7,267,914 Synthesis Results
FFXI Data
As of the 19 February 2015 update.
271 Zones
8,887 NPCs
25,601 Items

Worker Crawler BGW Wikia

Zone: Rolanberry Fields [S]

Item Count Average TH0 TH1 TH2 TH3+
Item 816Spool of silk thread 43 out of 279 15.4% 13.8% 0% 0% 25.0%

Spawns (11 total)

spool of silk thread
Spool of silk thread
Thread spun from crawler cocoons.