1) Is there a sliding scale on the relative value of particular species?
2) If you were stuck on a conveyor belt leading to slicing blades, alongside the world's last pair of Field Mice, would you volunteer to stay behind and be sliced up so that the mice would survive?
3) How about for the last pair of a kind of insect?
4) Is the contention that uniqueness is worth preserving, whereas any particular human, or large percentage of humans, are everyday and worth less?
5) If someone wanted to hunt you for sport, or eat you as a delicacy, and in exchange he'd pay an extravagant amount to a conservation fund that would save a species, would you volunteer?