Purple-throated Woodstars inhabit humid and wet forests, shrubby forest edges, and small clearings with trees. They often forage in the tops of flowering trees where males defend floral territories. Individuals give an appearance of floating as they fly from flower to flower. Hawking for insects is also common. This small hummingbird has a forked tail and its white flank patches can be seen in flight. Males have white chest bands and at times, the purplish throat of the male looks nearly black in the field.