Which hawk is most susceptible to apoplectic fits?

Cooper's hawk is indeed recognized for its susceptibility to apoplectic fits, a condition often triggered by sudden stress or excitement. This phenomenon is particularly noted in birds of prey, where rapid changes in heart rate and adrenaline levels can lead to these fits. Cooper's hawks, known for their agile hunting style and ability to navigate through dense vegetation, can experience intense moments of exertion and stress during hunting or territorial disputes, increasing the likelihood of such fits.

In contrast, the other species mentioned have different behavioral traits and physiological responses. For example, kestrels and merlins, while also raptors, typically exhibit a more stable demeanor and are less prone to the rapid shifts in heart rate that could lead to apoplectic fits. Goshawks, although powerful and aggressive hunters, do not exhibit the same frequency of this condition as Cooper's hawks. Understanding these nuances in behavior and physiology helps clarify why Cooper's hawk stands out as the most susceptible to apoplectic fits among the options given.