By Bird
Birds have structural adaptation (beaks)
(1) carnivorous birds such as eagles have powerful, sharp, curved beaks for killing and tearing the flesh of their prey which include small bird e.g. chick, rat, toad, and lizard.
(2) they have sharp, strong, curved claws for catching, gripping and killing the prey.
(3) the filter-feeding birds such as the water such have beaks with serrated edges for sieving out food form water into the mouth. They also webbed feet for swimming in the water.
(4) insect eaters, such as the wood peckers have long, slender, pointed beaks for picking inserts from cracks and holes in the barks of trees.
(5) nectar-sucking birds, such as the humming bird and sunbird, have long hollow beaks with tubular tongues for sucking nectar from flowers.
(6) fish eaters, such as the king fisher and heron, have long pointed beaks for killing and picking fish from the water and long feet for wadding in the water.
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