Chaco Chachalaca vs Rusty-margined Guan

In short

The Chaco Chachalaca and Rusty-margined Guan can be distinguished by their facial features and plumage details. The Chaco Chachalaca has a more uniform brownish body with a less distinct facial pattern, while the Rusty-margined Guan shows a pale to buff supercilium and reddish edges on the wing-coverts.

Identification tips

1. Look for the pale to buff supercilium on the Rusty-margined Guan. 2. Note the reddish edges on the wing-coverts and scapulars of the Rusty-margined Guan. 3. Observe the overall uniform brownish plumage of the Chaco Chachalaca. 4. Consider the habitat; both species can overlap, but the Rusty-margined Guan may be more approachable.

Size

Both species are similar in size, typical of large galliform birds.

Plumage

The Chaco Chachalaca is generally brownish with a less distinct facial pattern. In contrast, the Rusty-margined Guan has a pale to buff supercilium and is overall dark olive to brownish with reddish edges on the wing-coverts and scapulars.

Behaviour

Both species forage on the ground and in trees, consuming fruits and seeds. The Rusty-margined Guan is often more confiding, allowing closer approaches.

Habitat

Chaco Chachalaca is found in dry chaco scrub and low humid forests of southwest Brazil and northeast Argentina. The Rusty-margined Guan shares similar habitats but is more often found in low trees.