In general, hawks are sexually dimorphic, meaning that males and females of the same species can be different sizes. Males are typically smaller than females, with the difference in size being more pronounced in larger species.
The size of a hawk can also vary depending on its age. Juvenile hawks are typically smaller than adult hawks, and they may continue to grow for several years after they reach maturity.
Here are some examples of the sizes of different hawk species:
* American Kestrel: 10-12 inches long, wingspan of 20-24 inches
* Eurasian Kestrel: 10-12 inches long, wingspan of 20-24 inches
* Red-tailed Hawk: 19-25 inches long, wingspan of 44-54 inches
* Northern Goshawk: 21-26 inches long, wingspan of 38-46 inches
* Cooper's Hawk: 14-20 inches long, wingspan of 28-36 inches
* Sharp-shinned Hawk: 10-14 inches long, wingspan of 20-27 inches
* Harpy Eagle: 3-4 feet long, wingspan of up to 8 feet
* Philippine Eagle: 3-4 feet long, wingspan of up to 8 feet