Biology
Damselflies undergo
incomplete metamorphosis, with an aquatic nymphal stage. The female lays eggs in water, sometimes in underwater vegetation, or high in trees in
bromeliads and other water-filled cavities. Nymphs are carnivorous, feeding on
daphnia, mosquito larvae, and various other small aquatic organisms. The gills of damselfly nymphs are large and external, resembling three fins at the end of the
abdomen. After moulting several times, the winged adult emerges and eats flies, mosquitoes, and other small insects. Some of the larger tropical species are known to feed on
spiders, hovering near the web and simply plucking the spider from its perch.