There are several elf species in D&D, each with its unique characteristics. Some of the most popular ones include High Elves, Wood Elves, Dark Elves (Drow), Sea Elves, and Eladrin. Each elf species has its culture, abilities, and traits that differentiate them from the others. For example, High Elves are known for their intelligence and magical abilities, while Wood Elves are in tune with nature and can move silently through forests. Drow are dark-skinned and live underground, and they have access to powerful magic but are known for their cruelty.