Give an example of an animal specialized to eat food that few others eat. What adaptation does the animal have to eat that food?

1 Kangaroos and rats feed on dry seeds. They have the ability to convert dry seeds they eat into water inside their body. This helps their body not to get deficient of water. 

2 Parrots and Toucan (American bird) eat nuts and have strong curved beaks to crack and open the tough shells.