After I wrote the above, a better example occurs to me.
Bats carry rabies, which is about 100% fatal if left untreated.
So--on the surface--it would seem like a good idea if they were eradicated.
Yet many of them eat their weight in mosquitoes every night. Mosquitoes spread zika, dengue, malaria, encephalitis, and so on.
We would kill far more people from mosquitoe diseases by eliminating bats than we would save by eliminating rabies.
So bats are worth protecting even if we need to divert water (like in California), or put up with a lot of other hardships.
Bats carry rabies, which is about 100% fatal if left untreated.
So--on the surface--it would seem like a good idea if they were eradicated.
Yet many of them eat their weight in mosquitoes every night. Mosquitoes spread zika, dengue, malaria, encephalitis, and so on.
We would kill far more people from mosquitoe diseases by eliminating bats than we would save by eliminating rabies.
So bats are worth protecting even if we need to divert water (like in California), or put up with a lot of other hardships.