The Arabian Desert is a vast esert wilderness stretching from Yemen to the Persian Gulf and Oman to Jordan and Iraq. It occupies most of the Arabian Peninsula with an area of 2,330,000 square kilometers (900,000 mi²). At its center is the Rub'al-Khali, one of the largest continuous bodies of sand in the world. Gazelles, oryx, sand cats, and spiny-tailed lizards are just some of the desert-adapted species that survive in this extreme environment, which features everything from red dunes to deadly quicksand. The climate is extremely dry, and temperatures oscillate between extreme heat and seasonal nighttime freezes. It is part of the Deserts and xeric shrublands biome and the Palearctic ecozone.