At dusk, the hippo ambled along the riverbank, its heavy steps leaving deep prints in the mud.

We resolved the debate by deferring to the HiPPO, even though the data suggested a different direction.

In linguistics class, we learned that the hippo- prefix in many scientific terms originally means "horse".

The hippos lounged on the muddy riverbank as tourists photographed them from a safe distance.

During the meeting, the HiPPOs insisted on sticking to the original plan despite the team's data-driven objections.

Along the riverbank, hippo grass formed dense mats that provided shelter for fish and birds.

The hippo fly, a biting horsefly known as Tabanus biguttatus, hovered near the cattle and left a painful welt on the mare.

During the rainy season, hippo flies covered the riverbank, making the animals restless.

The velvet hippo at the shelter wagged its tail when I walked by.

At the evening feeding, the crowd gathered to watch the shy pygmy hippo wade into the pool.