Biology & Behaviour

The hippopotamus is one of the most physiologically extraordinary animals on Earth — and one of the least understood. This section covers the biology and behaviour of the common hippopotamus in depth: how its skin produces a natural sunscreen and antibiotic that no other animal can replicate, how its teeth grow continuously throughout its life and can reach 50 cm in length, how it moves through water without technically swimming, and why it can run at 30 km/h despite weighing up to three tonnes.

From reproduction and calf development to feeding habits, vocalisation, and the mechanics of territorial combat between bulls, every aspect of hippo biology covered here is based on peer-reviewed research and verified field data. Whether you are looking for a quick answer or a deep dive into hippo anatomy, this is where to start.