Common Kestrel vs American Kestrel

In short

The Common Kestrel and American Kestrel are both small falcons, but they can be distinguished by plumage and behavior. Common Kestrels have a more uniform rufous upperpart with black spots, while American Kestrels show more pronounced sexual dimorphism with males having blue-gray wings and a distinct facial pattern. Behavioral differences include the American Kestrel's tendency to hover more frequently.

Identification tips

1. Look for the blue-gray wings and distinct facial pattern in male American Kestrels. 2. Note the rufous upperparts with black spots in Common Kestrels. 3. Observe behavior: American Kestrels hover more frequently. 4. Consider habitat: American Kestrels are more often near human activity. 5. Be aware of sexual dimorphism in American Kestrels, with more pronounced differences between males and females.

Size

Both species are similar in size, but the American Kestrel is slightly smaller and lighter.

Plumage

Common Kestrels have rufous upperparts with black spots and a gray head and tail in males. American Kestrels exhibit sexual dimorphism: males have blue-gray wings and a rufous back with black barring, while females are more uniformly rufous with barring.

Behaviour

American Kestrels frequently hover while hunting, a behavior less commonly observed in Common Kestrels. Both species hunt from perches, but American Kestrels are more adaptable to human-modified environments.

Habitat

Common Kestrels are found in a variety of open habitats, while American Kestrels prefer open areas with short ground vegetation and are often seen near human activity.

Voice

Both species have similar high-pitched calls, but specific vocal differences are not well-documented in the sources.