About the Herd

The Porcupine Caribou herd is one of the largest migratory barren ground caribou herds in North America. The herd has gone up and down in size over time, but it has always been an important part of the ecology of the Western Arctic.

In order to try to understand the herd better, researchers monitor for changes in the herd’s size and composition. They also keep an eye on natural factors that can affect caribou numbers, such as disease.

Understanding confidence intervals

Estimated Porcupine Caribou Herd Population Size