The incident began on August 6, according to the gather page, with 30 burros captured, none shipped and no deaths.
As of August 14, 61 animals have been trapped, 49 have been shipped and no deaths have been reported.
The capture total includes 24 jacks, 28 jennies and nine foals.
Youngsters represented 14.8% of the animals gathered.
Of the adults, 46.2% were male and 53.8% were female.
The location of the trap site is not known but the burros are associated with the Cibola-Trigo HMA, which overlaps the Yuma Proving Ground.
Day 9 ended with 12 unaccounted-for animals.
The capture and removal goals are 80 each according to the latest schedule.
The roundup was not announced at the BLM news site.