Difference in size!
This picture shows an interesting comparison between an adult male and an adult female African Elephant. Size is the most significant visual sign of Elephants’ sexual dimorphism.
On the left is one of Thanda oldest and largest bulls (he his almost 50 years old) and on the right is Thanda’s oldest and largest female (she is around 40 years old). The female, a tusk-less African Elephant, is the matriarch of Thanda’s breeding herd of Elephant.
Picture by Christian Sperka – Specialist Photography Guide and Resident Wildlife Photographer – Thanda Private Game Reserve