I use a D&D 3rd edition naming convention for the monsters. Demons and devils are listed under "F" for fiends. Celestial humanoids are listed under "A" for Angels. Humanoid creatures that are character races, such as Elves and Dwarves are listed in this section, but are found under the "People" option.

The abbreviated letters stand for: Di-nosaur, Dr-agon, and Fi-ends (or Demons). There were so many that they needed their own sections.