Asian Emerald Cuckoo vs Square-tailed Drongo-Cuckoo

In short

The Asian Emerald Cuckoo and the Square-tailed Drongo-Cuckoo can be distinguished by their plumage and tail shape. The Asian Emerald Cuckoo has a striking iridescent green body, while the Square-tailed Drongo-Cuckoo is mostly black with a distinctive square tail. Both species are part of the cuckoo family, but their appearances and vocalizations differ significantly.

Identification tips

• Look for the iridescent green plumage of the Asian Emerald Cuckoo.
• Check the tail shape: the Square-tailed Drongo-Cuckoo has a square tail, unlike the more rounded tail of the Asian Emerald Cuckoo.
• Listen for vocalizations: the Asian Emerald Cuckoo's whistle versus the Square-tailed Drongo-Cuckoo's metallic notes.
• Consider habitat: Asian Emerald Cuckoos are more likely in open woodlands, while Square-tailed Drongo-Cuckoos prefer dense forests.

Size

Both species are relatively similar in size, but the Asian Emerald Cuckoo may appear slightly more compact due to its shorter tail.

Plumage

The Asian Emerald Cuckoo is notable for its iridescent green upperparts and white underparts with green barring. In contrast, the Square-tailed Drongo-Cuckoo is predominantly black with a glossy sheen and lacks the vibrant colors of the Asian Emerald Cuckoo.

Behaviour

Both species are often seen perched quietly in trees, but the Square-tailed Drongo-Cuckoo may exhibit more active behavior, such as sallying for insects.

Habitat

Both species inhabit forests, but the Asian Emerald Cuckoo is more commonly found in open woodlands and forest edges, while the Square-tailed Drongo-Cuckoo prefers denser forest interiors.

Voice

The Asian Emerald Cuckoo has a distinctive, repetitive whistle, while the Square-tailed Drongo-Cuckoo produces a series of sharp, metallic notes. These vocal differences are often the most reliable way to distinguish them when not in view.