In mythology, a siren is a creature that lures sailors to their doom with their sweet song. They are depicted as half-bird and half-woman, with the body of a bird and the head of a human. Sirens are traditionally understood to be female, but similar figures with beards can be labeled either as Sirens or as daemons. In Homers Odyssey, the hero Odysseus escaped the Sirens call with the help of the sorceress Circe, who advised him to fill his crews ears with wax so that they could not hear the Sirens. Sirens are also known for their alluring voices, which can be hard to resist but can lead to a bad conclusion if heeded, hence the term "siren song").

Sirens are often depicted as scary, humanoid creatures with sharp teeth for tearing apart humans. They are considered to be evil creatures who live in the sea and have a penchant for killing male sailors. Little is known about sirens, and whether or not they can become human, how they kill, and if they are evil are questions that cannot be answered with 100% certainty.

In art, the Sirens appeared first as birds with the heads of women and later as women, sometimes winged, with bird legs. Siren figures can appear alongside protomes shaped like griffins, hybrid creatures with the body, tail, and back legs of a lion combined with the head, wings, and talons of an eagle.

In summary, a siren is a mythical creature that lures sailors to their doom with their sweet song. They are depicted as half-bird and half-woman, with the body of a bird and the head of a human. Sirens are often considered to be evil creatures who live in the sea and have a penchant for killing male sailors.