Need to work through the entire chain of effects here but I think (granted that a wild animal is a moral patient), crushing it for a near instant death is probably just about the least painful way it can die.
And since death is inevitable for mosquitoes, crushing them actually leads to less death-adjacent suffering than the mosquito would otherwise experience in expectancy. You could even see it as mosquito euthanasia. This is especially so if one views the scope of our moral obligation to certain animals as including the avoidance of unnecessary suffering but not the promotion of any sort of affirmative happiness or well-being.
Need to work through the entire chain of effects here but I think (granted that a wild animal is a moral patient), crushing it for a near instant death is probably just about the least painful way it can die.
And since death is inevitable for mosquitoes, crushing them actually leads to less death-adjacent suffering than the mosquito would otherwise experience in expectancy. You could even see it as mosquito euthanasia. This is especially so if one views the scope of our moral obligation to certain animals as including the avoidance of unnecessary suffering but not the promotion of any sort of affirmative happiness or well-being.