The one hawk that seems to be most affected by heat and becomes more difficult to fly as the temperature rises (70 and above) is the...

The goshawk is particularly sensitive to high temperatures, and this influences its performance during flights as the heat increases, especially above 70 degrees Fahrenheit. Goshawks are robust birds but have a thicker build and dense plumage, which can limit heat dissipation in warm conditions. As temperatures rise, they may exhibit signs of stress, reducing their stamina and willingness to fly.

In contrast, red-tailed hawks and kestrels, while they can also be affected by heat, generally have adaptations that allow them to cope better in warmer weather. Red-tailed hawks are larger and can often find thermals or other forms of high-altitude air currents to assist in their flight during hot days. Kestrels, being smaller and lighter, are also more agile and have behaviors that help them manage their body temperature effectively, such as perching in shaded areas. Thus, the goshawk’s unique physiological makeup and behavior make it notably more susceptible to the challenges posed by heat, distinguishing it from the other hawk species mentioned.