How to identify the Harris's Hawk

To correctly identify the Harris's Hawk (Parabuteo unicinctus), check each of these features. Birds can be tricky: habit, habitat, and call often confirm a sighting that a single photo cannot.

Size at a glance

Length

45-59 cm (18-23 in)

Wingspan

100-120 cm (39-47 in)

Weight

500-1600 g (1.1-3.5 lbs)

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Adults are predominantly dark brown to blackish, with chestnut (rufous) shoulders, wing linings, and thighs. The tail is long and black with a distinctive white base and a white terminal band. The underparts are dark, contrasting with the rufous areas.

2. 2

   Beak shape

   Shape and color of the bill: a key field mark.

   Strong, hooked beak, dark gray to black with a yellow cere.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Dark brown.

4. 4

   Leg color

   Leg and foot color.

   Yellow legs and feet with black talons.

5. 5

   Distinguishing features

   Standout features that separate this species.

   The combination of dark body plumage, prominent rufous shoulders and thighs, and a black tail with a white base and white tip is diagnostic. The yellow cere and legs are also key features.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles are streaked and mottled, appearing much browner than adults. They have a buffy or whitish belly with heavy dark streaking, and the rufous patches are less distinct. The tail still shows the white base and tip, but often has more irregular barring. They gradually acquire adult plumage over 2-3 years.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   No significant seasonal plumage changes; plumage remains consistent year-round.

8. 8

   Sexual dimorphism

   How males and females differ.

   Females are typically larger and heavier than males, but plumage is identical.

Key field marks

• Plumage Coloration. Look for the overall dark brown to black body, contrasting sharply with the bright rufous (chestnut) shoulders, wing linings, and thighs. This combination is unique among North American raptors.
• Tail Pattern. Observe the tail: it is black with a distinct white base and a white terminal band. This 'white sandwich' on the tail is a key field mark.
• Yellow Cere and Legs. Note the bright yellow cere (fleshy area above the beak) and yellow legs and feet. This provides a good contrast with the dark plumage.
• Social Behavior. If you see multiple raptors hunting cooperatively or perching together, especially in arid regions, it's a strong indicator of Harris's Hawks. This behavior is highly unusual for other raptors in its range.
• Flight Profile. In flight, look for the rufous underwing coverts and the distinctive tail pattern. They have broad, rounded wings and a relatively long tail.

Explore the Harris's Hawk