There are many mythical creatures in Serbian folklore such as:
Psoglav is demon from Serbian folklore. It is represented as chimera, with horse hind legs, human torso and dog's head with one eye and iron teeth. It lived in caves with plenty of gemstones, but without Sun. It ate people, sometimes and dug their graves to feast on their corpses.
Todorac is the most powerful and evil demon from Balkan folktales that is half-human, half-horse. But it should not be mistaken for Greek centaur.
They look like riders sprouting from horse's back who are wearing cloaks that obscure their faces. Nobody ever saw their faces. While they are passing trough villages and towns, they kill everybody on their path by stomping them. Somewhere at the end of winter, there was Todor's Saturday and it was the only day when they appeared. Among them there was Great Todor, who was lame, white demon covered in white cloak and carried rattling chains. People then had special ritual to appease them and to banish them. They created cookies that looked like horse hooves and portion of those cookies was always given to horses. At that day, children were forbidden to get out of house and people didn't work.
Osenja is female demon from folklore of Eastern Serbia. She is represented as woman in white clothes. She could be seen on bridges, close to roads or on hills in middle of night. Osenja had habit to seduce men and to lead them across forests and fields, making them tired at dawn.
Babaroga is represented as very ugly, hunchbacked old woman with horn on head, who live in dark caves. According to folktales, Babaroga likes to steal naughty children and to bring them to her lair.
Poludnica is spirit that appears on summer grain fields in the noon. It is represented as pale girl in white dress. She likes to grab men and women who appear on fields and throw them on the ground mercilessly.
Drekavac (Screamer) is demon from Serbian folklore, created from dead, unbaptized toddlers. It is represented as tiny hairy creature with long sharp claws and long fur, which he stomps upon and yells in mixture of child's cry, scream and wolf's howling. He could scream so loudly that people could get deaf from him. He lives on graveyards, in forests or shores of rivers, generally, in places where it died as human. If human approaches him, he could jump on their back and force them to run until first calls of rooster. If human resists Drekavac, their face could be shredded with claws. Drekavac is afraid of light and dogs.
Bukavac is demonic creature from Serbs that live on northern part of Serbia. Similar to Drekavac, it likes to yell very loudly, but unlike Drekavac, it lives close to swamps, rivers and lakes and has different look. It has six legs, slimy skin, big mouth, long tail and long curved horns on head. It likes to drown people and animals who happen to walk close to their watery lair at late night.
Čuma is embodiment of Black Death disease from Serbian folktales. According to them, it is represented as ugly old woman with big eyes and messy hair. Čuma appeared at night from attic or chimney, carrying clay bowl with arrows. People tended to wash their dishes before sleep, because Čuma had habit to scratch them with her dirty nails and to poison them.
Beda (misery) is demon from Southern Slavic folklore that is far descent from ghosts and close to Čuma. She wanders across the world, attacks people and torture them. There are sayings that ''Beda found them'' or ''Beda follows them from cradle to grave''. Beda is bony and slimy creature that breeds very quickly, likes to steal things from people and to dig them deep into the ground.
Vila is creature from Serbian beliefs that is usually benign to humans. She is imagined as very beautiful and eternally young girl with bird or butterfly wings, golden hair, white dress and armed with bow and arrows. By beliefs, her power was in her hair. She lives far from humans, in forests, close to lakes and rivers or in clouds. It is believed that Vila is born from dew, certain flowers or when rainbow appears on sky. She could transform into any animal, especially falcon, wolf, swan or mare. She could be seen riding horses or elks in hunting, but very often could be seen dancing in circle with other Vilas. She could seduce heroes in fairytales or sometimes be their sisters-in-law, healing their wounds with various herbs that are created in battles. Human girls used to appease her for beauty or protection. Vila hardly forgives insults and could kill the offender with her eyesight or bow and arrows. Even in cases when she causes evil things, she still remains beautiful and seductive. She can become loyal to human by stealing her clothes or she can become ordinary woman if somebody takes out her wings. It is believed that seeds of garlic plant give her eternal youth. During times of New Moon, she becomes similar to Rusalka and therefore dangerous to humans.
Rusalka is type of fairy that lives close to lakes and rivers. Pretty much like Vila, they are imagined as beautiful, eternally young girls with red or green hair, however they are extremely hostile toward humans. They like to seduce men and to drown them, or to kill them with loud laughter. They are created from souls of young girls that are drowned or faced violent death. The most powerful repellent against Rusalke is wormwood or garlic.
Vilenjak is male version of Vila. Vilenjak is as tiny as flower of clover and could be summoned only if somebody finds or eats four-leaf clover. It is believed that they bring good luck to people.
German is creature tied to weather. He could cause hailstorms, rain and thunderstorms. People used to create little figures out of clay to evoke rain during Summer Solstice (or Kupala celebration).
Danica is Serbian name for Venus planet which could be seen as morning ''star'' that calls upon the dawn. In folk tales, it is represented as sister of Sun or Moon, sometimes even as daughter of Sun.
Balačko is 3-headed giant from. From one head he could spit fire, from second one he could breathe cold wind. When he depletes his magical weapons, he was easy to kill.
]and if childen are mischievious this owl takes them away. 
