Kafue lechwe horns on the dried out plains in Zambia.

贊比亞乾旱平原上的喀輔拉河驢羚羊角。

As they report in the Journal of Mammalogy, they found that as the female lechwe got older, the sex and the birth weight of their young steadily shifted.

相关表在哺乳动杂志上，报道，母羚羊年龄的增加，子代的出生重和性别比例也在稳定的之变化。