It is this interest that the right to life protects. Thus only self-conscious beings can have a right to life. Rights trump other moral considerations. Rights shield the possessor against claims of greater need. Neither exercising one's own rights nor respecting the rights of others will guarantee the best moral outcome.
Rights imply obligations on the part of others.
Membership in the species Homo sapiens is neither necessary nor sufficient for being a person. Extending the benefit of the doubt to other animals. Indirect reasons for objecting to the killing of such animals. There are two ways to increase the amount of pleasure in the world. One way is to increase the pleasure of existing being.