Hawaiian Hawk vs Swainson's Hawk

In short

The Hawaiian Hawk and Swainson's Hawk can be distinguished by their range and plumage. The Hawaiian Hawk is endemic to Hawaii, while Swainson's Hawk is found in North America, particularly in open habitats. Plumage differences include the Hawaiian Hawk's more uniform coloration compared to the variable morphs of Swainson's Hawk.

Identification tips

1. Range: Hawaiian Hawk is only found in Hawaii; Swainson's Hawk is found in North America. 2. Plumage: Look for the uniform coloration of Hawaiian Hawk versus the variable morphs of Swainson's Hawk. 3. Behavior: Note solitary behavior of Hawaiian Hawk compared to the social nature of Swainson's Hawk during migration. 4. Habitat: Hawaiian Hawk in forested areas, Swainson's Hawk in open plains. 5. Vocalization: Listen for the high-pitched 'kee-o' of Hawaiian Hawk versus the whistle or scream of Swainson's Hawk.

Size

Both species are medium-sized hawks, but Swainson's Hawk tends to be slightly larger with longer wings.

Plumage

Hawaiian Hawks are generally uniform in color, either dark or light morphs, while Swainson's Hawks exhibit more variation, including light, dark, and intermediate morphs. Swainson's Hawk often shows a distinctive white throat and a contrasting dark bib in light morphs.

Behaviour

Hawaiian Hawks are more solitary and territorial, often seen perching quietly. Swainson's Hawks are more social, especially during migration, and are often seen soaring in groups.

Habitat

Hawaiian Hawks are restricted to forested areas on the Hawaiian Islands. Swainson's Hawks prefer open plains and grasslands in North America and migrate to South America for the winter.

Voice

The Hawaiian Hawk's call is a high-pitched 'kee-o' sound, while Swainson's Hawk has a more varied call, often described as a high-pitched whistle or scream.