The main features of environmental significance at Casey are the large areas of mosses and lichens. The Australian Antarctic Territory is home to some of the rarest ecosystems on the planet and the plant life at Casey is as good as it gets. Casey has the most extensive and best developed plant communities in continental Antarctica.

Casey is fortunate in having two protected sites very close to the station and 2 others nearby.

The Antarctic Specially Protected Area (ASPA) near the station protects moss and lichen communities that are the richest anywhere in Antarctica outside the Antarctic Peninsula. Nearby specially protected areas are Ardery and Odbert islands, the North-east Bailey Peninsula, the Clark Peninsula, and the Frazier Islands.

These areas are vulnerable to human impacts. Special permits are required to enter them.

Casey wildlife

Wildlife seen at Casey includes: