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

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

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

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

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

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.

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

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

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