The cactus finch has a tough beak that is good for eating cactus and its nectar. It works like a pair of needle-nosed pliers.

The warbler finch has a small pointed beak for probing into cracks and crevices to obtain small insects. It works like a pair of tweezers.

The large ground finch has a heavy strong beak adapted for cracking big, hard seeds. This finch's beak works like a nut cracker.

The vegetarian finch has a short, thick beak and the upper part of it points downward, which is used for biting and tearing. It works like a pair of clippers.