Groove-billed Ani vs Black-billed Cuckoo

In short

The Groove-billed Ani and Black-billed Cuckoo can be distinguished primarily by their bills and habitat preferences. The Groove-billed Ani has a distinctive grooved bill, while the Black-billed Cuckoo has a smooth, slender bill. Additionally, the Ani is often found in open pastures, whereas the Cuckoo prefers densely wooded areas.

Identification tips

• Bill shape: Look for the grooved bill of the Groove-billed Ani versus the smooth bill of the Black-billed Cuckoo.
• Habitat: Observe the surroundings; open fields suggest Groove-billed Ani, while dense woods suggest Black-billed Cuckoo.
• Social behavior: Groups indicate Groove-billed Ani, solitary behavior suggests Black-billed Cuckoo.
• Vocalization: Listen for the Ani's harsh calls compared to the Cuckoo's repetitive 'cu-cu-cu'.

Size

Both species are similar in size, but the Groove-billed Ani appears bulkier due to its more robust body structure.

Plumage

The Groove-billed Ani is uniformly black with a glossy sheen, while the Black-billed Cuckoo has a more muted brownish-gray plumage with a white underbelly.

Behaviour

Groove-billed Anis are social and often seen in groups, foraging on the ground or near livestock. Black-billed Cuckoos are more solitary and secretive, often remaining hidden in foliage.

Habitat

Groove-billed Anis are typically found in open pastures and fields, often near livestock. Black-billed Cuckoos prefer densely wooded habitats, especially coniferous forests.

Voice

The Groove-billed Ani has a variety of harsh, grating calls, while the Black-billed Cuckoo is known for its staccato, repetitive 'cu-cu-cu' call, often heard during its nocturnal flights.