Gunung Mulu National Park near Miri, Sarawak, Malaysian Borneo, Deer Cave.

Deer Cave has over two million bats that roost on its high roof every day, and emerge most evenings in one of the world’s most spectacular bat flights.

In most of the Mulu caves, bats and swifts provide the guano that supports a pyramid of cave fauna, topped by large spiders and centipedes.

Gunung Mulu National Park near Miri, Sarawak, Malaysian Borneo, Deer Cave.

Deer Cave has over two million bats that roost on its high roof every day, and emerge most evenings in one of the world’s most spectacular bat flights.

In most of the Mulu caves, bats and swifts provide the guano that supports a pyramid of cave fauna, topped by large spiders and centipedes.