Common Hawk-Cuckoo vs Lesser Cuckoo

The Common Hawk-Cuckoo and Lesser Cuckoo can be distinguished by their size and plumage. The Common Hawk-Cuckoo is larger with a more pronounced hawk-like appearance, while the Lesser Cuckoo is smaller and more compact. Vocalizations are distinct, with the Common Hawk-Cuckoo having a characteristic 'brain-fever' call.

1. Size and Shape: Look for the larger size and hawk-like appearance of the Common Hawk-Cuckoo. 2. Plumage: Note the more pronounced barring on the underparts of the Common Hawk-Cuckoo. 3. Vocalization: Listen for the loud 'brain-fever' call of the Common Hawk-Cuckoo. 4. Habitat: Consider the habitat; the Common Hawk-Cuckoo is more likely in open forests and gardens.

The Common Hawk-Cuckoo is larger and more hawk-like in appearance compared to the smaller, more compact Lesser Cuckoo.

The Common Hawk-Cuckoo typically shows a more pronounced barring on the underparts and a hawk-like appearance, while the Lesser Cuckoo has a more uniform plumage with less distinct barring.

Both species are secretive and often remain hidden in foliage, but the Common Hawk-Cuckoo may be more conspicuous due to its vocalizations.

Both species inhabit wooded areas, but the Common Hawk-Cuckoo is more often found in open forests and gardens, while the Lesser Cuckoo prefers denser forests.

The Common Hawk-Cuckoo is known for its distinctive 'brain-fever' call, which is repetitive and loud. The Lesser Cuckoo's call is less well-known and generally softer.