Shackleford Herd Grows In Latest Census

The Park Service said in a news release today that 117 horses were living on the barrier island at the end of 2020, up from 111 at the end of 2019.  The growth rate was 5.4%.

The average lifespan was eleven years and no mares were treated with contraceptives in 2020, according to the annual report.

The herd was 38% male and 62% female.

The expected range of variation, based on rudimentary statistical formulas with n = 117 and p-bar = .50, is 36% to 64%.

The observed percentages fall within those limits so they could be attributed to chance, the result of a simple random process centered at 50% males / 50% females.

Subject-matter knowledge may suggest otherwise.

RELATED: Park Service Reports Shackleford Census Results.

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