Common Hawk-Cuckoo vs Common Cuckoo

In short

The Common Hawk-Cuckoo and Common Cuckoo can be tricky to differentiate, but the most reliable field mark is their vocalizations, which are distinct. The Common Hawk-Cuckoo has a more hawk-like appearance with a barred underbody, while the Common Cuckoo is sleeker with a more uniform grey plumage.

Identification tips

1. Listen for calls: The Common Hawk-Cuckoo's 'brain-fever' call vs. the Common Cuckoo's 'cuckoo' call. 2. Check underbody markings: Look for barring in the Common Hawk-Cuckoo. 3. Observe habitat: Common Cuckoo is more likely in open areas, while the Common Hawk-Cuckoo prefers wooded environments. 4. Consider size and shape: The Common Cuckoo is slightly larger and more robust.

Size

Both species are similar in size, but the Common Cuckoo is generally slightly larger and more robust.

Plumage

The Common Hawk-Cuckoo has a barred underbody and a hawk-like appearance, whereas the Common Cuckoo has a more uniform grey plumage with a paler underbody and lacks the barring.

Behaviour

Both species are brood parasites but may differ in host selection and habitat use. The Common Cuckoo is more often seen in open areas, while the Common Hawk-Cuckoo is more associated with wooded habitats.

Habitat

The Common Hawk-Cuckoo is typically found in wooded areas and forests, whereas the Common Cuckoo is more adaptable and can be found in a variety of habitats including open fields and edges of forests.

Voice

The Common Hawk-Cuckoo has a distinctive three-note call often described as 'brain-fever,' while the Common Cuckoo's call is the classic 'cuckoo' sound.