aggregation

References

Images

A small herd of caribou (Rangifer tarandus) stands together on open ground with a dense evergreen forest and hills in the background.

A school of schoolmaster fish, Lutjanus apodus, with silver bodies and yellow fins, swims closely together above a coral reef in the clear waters of the Cayman Islands.

aggregation: Media

population distribution

Images

A small herd of caribou (Rangifer tarandus) stands together on open ground with a dense evergreen forest and hills in the background.

Caribou

A herd of caribou (Rangifer tarandus).

Encyclopædia Britannica, Inc.

Butterflies

Butterflies

Aggregation of pink-edged sulfur butterflies (Colias interior).

John H. Gerard

A school of schoolmaster fish, Lutjanus apodus, with silver bodies and yellow fins, swims closely together above a coral reef in the clear waters of the Cayman Islands.

Schoolmasters

Schoolmasters (Lutjanus apodus) on a reef in the Cayman Islands.

© Jim Lipschutz/Shutterstock.com