I saw one of the 1st dragonflies of spring today. As nymphs, they live underwater, & once they become adult dragonflies, they fly away & live on land. They still spend much of their time near water though. Dragonflies eat on the go, using baskets formed on their legs to catch insects while flying. They can fly so fast this is usually not a problem for them (but it is for the other insect). They are predators from nymphhood, eating smaller insects & even tadpoles & small fish. They can be virtually any color, & different species often look nothing alike.