Swinging their noses from side to side when they smell an ant or termite nest underground, aardvarks dig furiously into even the hardest-baked soil to find their supper. They can eat as many as 50,000 insects in one night and can walk up to six miles searching for food. They eat really fast but walk relatively slowly—unless they feel threatened. Then they speed away surprisingly quickly. While aardvarks may not see very well, they have an excellent sense of hearing. They’re nocturnal so they spend their days out of the sub-Saharan African sun sleeping in cool deep holes called burrows. The burrows are quite long—up to forty feet at times—and often have several entrances and chambers. Sometimes other animals use abandoned aardvark burrows as shelters. The only sounds aardvarks make are grunts and bleats.