The beaks of 2 types of tree finches:

1. Platispyza with inset image of a tool resembling its beak structure - This vegetarian finch strips bark from woody plants with a beak designed to grip and hold tightly, like a pair of pliers.
2. Certhidea with inset image of a needle-nose pliers or forceps - This finch feeds on small, exposed insects that it picks off plant surfaces. Its thin, straight, narrow beak works like needle-nose pliers or forceps to firmly grasp small objects at the tip, resembling its thin, straight and narrow beak to help it grab exposed insects.

The beaks of 2 types of ground finches:

1. Pinaroloxias with inset image of a curved needle-nose pliers - This finch feeds on insects, fruit, and nectar. Its beak works like curved, needle-nose pliers that are good at probing and grasping at the tip.resembling its beak structure to help probing and grasping at the tip.
2. Geospiza with inset image of a heavy duty wire cutter resembling its thick, strong and sharp beak - This finch feeds on large, thick seeds with a beak that is thick, strong, and sharp. This beak works like heavy-duty wire cutters to apply strong pressure and cutting force near its base.