A Bloat of Hippos

The sight of a group of hippopotamuses gathered in the waterways of Africa presents a truly impressive picture. These enormous semi-aquatic mammals, often seen partially submerged, possess a distinctive barrel-shaped torso, short legs, and immense size. Their substantial frame, which can see males weigh up to 8,000 pounds, is largely attributed to a thick layer of subcutaneous fat that assists with buoyancy in the water (Review).

This rotund physique is precisely what gives rise to their rather descriptive collective noun: a "bloat" of hippos. Coined in 1939, this term aptly captures the visual of multiple massive hippos congregated together, appearing quite full, particularly after a night of grazing on vast quantities of grass. Hippos are primarily herbivores, consuming large amounts of grass, which can lead to noticeably full stomachs.

Common hippos are social animals, often forming groups that typically consist of several adult females, their calves, and a dominant male. These groups can range from a dozen to many dozens of individuals, occasionally even numbering in the hundreds when water sources are limited. They spend the majority of their day submerged in water or mud to regulate their body temperature, emerging at dusk (Review) to graze on land.

Despite the seemingly placid image evoked by a "bloat" of hippos resting in the water, these animals are known for their territorial and aggressive nature, particularly the males. Their powerful jaws and imposing size make them formidable creatures, underscoring that their appearance, while descriptive of their collective noun, belies a complex and often dangerous demeanor.