Which bird is known to be delicate of health, high-strung, and hard to manage?

The Sharp-shinned hawk is recognized for its delicate health, high-strung nature, and challenges in management. This species tends to be more nervous and sensitive compared to other raptors, making them less suitable for certain forms of training and handling. Their small size and agility contribute to their skittish behavior, which can pose difficulties for falconers, particularly when it comes to establishing a trusting relationship.

While the Red-tailed hawk and Goshawk are both capable of being trained effectively and are often used in falconry, they generally display more robust health and steadiness than the Sharp-shinned. The Bald eagle, while impressive, is large and powerful but does not share the same delicate nature described in the question. Thus, the identification of the Sharp-shinned hawk as delicate and high-strung aligns with the behavioral characteristics that make it challenging for falconers to manage.