Carnivores, they eat other animals to obtain their food.
Primate's have prehensile hands and feet. The characteristic features of primate's prehensile hands are as follows:
1. These have five digits or fingers that includes thumb that allows the animal to hold or grab any object.
2. Hands are sensitive and have touching sensation.
These properties make the life of primates easy to live on trees.
The finch that usually preys on insects located in cracks would most likely have beaks that are shaped as sharp and thin. To reach into crevices, a small and pointy beak will fit and make it easier for the finch to capture its small prey.