It was not an unreasonable fear.

Unreasonable fear of bees in humans may also have a detrimental effect on ecology.

Although one should not have an unreasonable fear of bats, one should avoid handling them or having them in one's living space, as with any wild animal.

Exposure-based methods of behavioral therapy are well suited to the treatment of phobias, which include intense and unreasonable fears (e.g., of spiders, blood, public speaking).