Sightings of mysterious human-sized bats have been reported in all corners of the world. They are described as having black or gray fur, a monkey-like face, clawed feet and a 10-15 foot wingspan. In Brazil they are called "bat people." In Mexico, an ancient Mayan cult worshiped the "death bat." The rainforests of Java echo the cries of a bat creature called the "Ahool" because of its distinct "a-hool" vocalization. In Vietnam they are known as "night flyers." These winged humanoids are generally 5 feet tall with eerie feminine features. They are known to swoop down on their victims and attack several times. The continent of Africa has reported many sightings of bat-like beasts. In Cameroon, it is called the "Olitiau," an immense bat creature that was seen by famed naturalist Ivan T. Sanderson in 1932 while on expedition. In Senegal, the creature is called "Guiafairo." In Ghana, the bat-like creature is called "Sasabonsam." A similar creature exists in Madagascar and is called the "Fangalabolo," and in Indonesia, tales of the "Organ-Bati" abound where the creature is said to roost in an extinct volcano and snatch children.
The Cave Demons do not appear in The Secret Saturdays series specifically.