Some animals ate adapted to feed on fluids. Nectar, a surgery fluid in flowers, is an Important source of food for many animals, such ad hummingbirds, bees, butterflies and moths. Because nectar is found at the bade of the flower, adaptations of mouthparts are necessary for these animals to reach the nectar. Thus, hummingbirds have long pointer beaks and tongues, while butterflies have long feeding tubes called proboscises.
Many external parasites are also fluid feeders. Insects like aphids, leaf hoppers and white flies feed on the sap of plants. They have feeding organs that can pierce the surface of plants and suck the sap in the phloem.
Insects such ad mosquitoes, assassin bugs and ticks suck the body fluids of other animals. Ticks pierce the skin of the host by means of hooked mouthparts and feed on blood.
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