I don't think humans are particularly special, and I don't believe in human rights. At least in the sense that there is some fundamental guarantee to liberty, property, or whatever.

Nature is cruel, and if given half a chance, will for example snatch the life from a 2-month-old baby. That baby did nothing wrong, but did not have the "human right" to life and liberty, just a hope for it.

We can still institute rules we agree to abide by, in hopes that our lives will be better overall. But that's just self-interested agreement, not some immutable "right" inherently bestowed upon us.