Speckled Chachalaca vs Variable Chachalaca

The Speckled Chachalaca and Variable Chachalaca are both medium-sized, brownish birds of the Cracidae family, but they can be distinguished by subtle differences in plumage and size. The Speckled Chachalaca is generally browner with a more scalloped appearance on the foreneck, while the Variable Chachalaca may show more variation in head coloration.

Look for the scalloped foreneck in the Speckled Chachalaca and check for any chestnut or rufous tones in the Variable Chachalaca's head. Consider size if both species are seen together, as the Speckled Chachalaca is generally larger.

The Speckled Chachalaca averages larger in both wing and tail measurements compared to the Variable Chachalaca.

Speckled Chachalaca is browner overall with a scalloped foreneck, lacking the chestnut wash seen in some other chachalacas. The Variable Chachalaca may have more variable head coloration, potentially showing rufous or chestnut tones.

Both species forage for berries and fruit in small flocks, often in trees or on the ground. Their nesting habits are similar, utilizing shrubs or low trees.

Both species inhabit similar environments, often found in forested areas, but specific range overlap may vary, particularly in regions like northeast Bolivia and Brazil.

Vocalizations are not well-documented in the provided notes, and further field observation may be necessary to distinguish them by sound.