Great Spotted Cuckoo vs Yellow-billed Cuckoo

In short

The Great Spotted Cuckoo and Yellow-billed Cuckoo are both medium-sized cuckoos, but they can be distinguished by their bill color and plumage patterns. The Great Spotted Cuckoo has a distinctive dark bill and spotted wings, while the Yellow-billed Cuckoo features a yellow lower mandible and lacks spots.

Identification tips

1. Look for the bill color: Great Spotted has a dark bill, Yellow-billed has a yellow lower mandible. 2. Check for wing spots: present in Great Spotted, absent in Yellow-billed. 3. Note the crest: more pronounced in Great Spotted. 4. Observe the habitat: Great Spotted in open areas, Yellow-billed in forests. 5. Listen for vocal differences: harsh calls versus soft 'coos'.

Size

Both species are similar in size, but the Great Spotted Cuckoo may appear slightly bulkier.

Plumage

The Great Spotted Cuckoo has a grayish head with a crest, spotted wings, and a pale underbelly. In contrast, the Yellow-billed Cuckoo is more uniformly brown above with a white belly and lacks the spotting.

Behaviour

Both species are known for their secretive behavior, often staying hidden in foliage. The Yellow-billed Cuckoo is more likely to be seen in the U.S. during migration.

Habitat

The Great Spotted Cuckoo is found in open woodlands and scrub in Europe and Africa, while the Yellow-billed Cuckoo prefers deciduous forests and riparian areas in North America.

Voice

The Great Spotted Cuckoo has a harsh, repetitive call, while the Yellow-billed Cuckoo's call is a series of soft, hollow 'coo' notes.