An increasing number of elephants have no tusks, according to a survey.

Research at the Queen Elizabeth National Park, Uganda, showed that 15% of female elephants and 9% of males in the park were born without tusks.

Evidence of a trend in tuskless elephants has been reported elsewhere.

98 per cent of the female elephants at South Africa’s Addo Elephant National Park are reportedly tuskless — probably the most impactful example of the “tuskless gene.” In 1931, when the park was first established, only 11 elephants were spared from big game hunters. Out of eight surviving females, four were tuskless, the Independent reports.