Which of the following is NOT a requirement for a hawk house or mews?

In the context of a hawk house or mews, one of the primary considerations is the well-being and comfort of the bird. Proper ventilation is essential for ensuring that the environment remains fresh and prevents the buildup of harmful gases or excessive heat. Therefore, poor ventilation would be detrimental to a hawk's health and is not a requirement; in fact, it is something that should be avoided.

The other options reflect important requirements for the housing of hawks. Having enough space for a hawk to stretch its wings is crucial for their physical health, especially when tethered. Access to a bath with clean, fresh water is necessary for hygiene and helps the hawk to maintain its feathers, which are vital for insulation and flight. Additionally, several perches are needed for free-lofted hawks to provide them with options for resting and engaging in natural behaviors. Each of these factors contributes positively to the overall care and management of the hawk, emphasizing that proper conditions must be met to ensure their welfare.