Black Mountain Roundup, Part 2, Day 132

The operation began on March 9, a resource enforcement action that follows a wild burro removal in 2020. Gather stats through July 18:

Burros captured: 303, up from 243 on Day 122
Capture goal: 500
Removal goal: Probably 500
Returned: 0
Deaths: 0
Shipped: 209, no change from Day 122

The cumulative total on the gather page is 306.

Foals represented 14.9% of the burros gathered. Of the adults, 61.6% were male and 38.4% were female, not what you’d expect to find in a sample of n = 303 taken from a simple random process centered at 50% males / 50% females.

Do these results tell you anything useful about the herd at large?

There were 94 burros in the unaccounted-for category.

The incident is not open to public observation.

Supplemental statistics:

AML: 478
Pre-gather population: Unknown
Forage liberated to date: 1,818 AUMs per year
Water liberated to date: 1,515 gallons per day
Burros displaced from HMA by privately owned livestock: 1,222
True AML: 1,700
Excess animals before roundup: Unknown

UPDATE: The limits of variation for males and females should be based on n = 258 adults, not n = 303. The observed percentages are still outside the calculated limits with n = 258. The formula for computing the limits can be found in this Wikipedia article.