Utilitarian's view on rights

Utilitarians sometimes use the word ‘rights,’ but strictly speaking, what they mean differs from rights in deontology.

For example, Peter Singer is famous as an animal rights advocate, but strictly speaking, his theory is not based on animal rights. This may be one of the most important, yet often overlooked, aspects of his argument. Singer says there are no natural rights automatically granted at birth, to either animals or humans. For Singer, a utilitarian, saying ‘an animal or human has natural rights’ is merely a convenient shorthand for saying that the being can experience pain or pleasure and therefore has interests. Singer explains why we should immediately stop every form of animal abuse without relying on the concept of rights. For this reason, the ‘animal liberation movement’ and the ‘animal rights movement’ are sometimes distinguished.