Chotoy Spinetail vs Grey-bellied Spinetail

In short

The Chotoy Spinetail and Grey-bellied Spinetail are both members of the Furnariidae family but can be distinguished by their plumage and habitat preferences. The Chotoy Spinetail has a striking black-and-yellow throat and heavily streaked upperparts, while the Grey-bellied Spinetail is generally dull gray with a small blackish throat mark. Habitat is a key differentiator, with the Chotoy Spinetail favoring open areas and the Grey-bellied Spinetail confined to the undergrowth of the Atlantic Forest.

Identification tips

1. Look for the black-and-yellow throat of the Chotoy Spinetail. 2. Note the habitat: open areas suggest Chotoy, dense forest undergrowth suggests Grey-bellied. 3. Listen for vocalizations: Chotoy has a low-pitched series, while Grey-bellied is more likely to be heard than seen.

Size

Both species are similar in size, typical of spinetails, but exact measurements are not specified.

Plumage

Chotoy Spinetail has a black-and-yellow throat and heavily streaked upperparts, whereas the Grey-bellied Spinetail is dull gray with a small blackish throat mark and a whitish chin.

Behaviour

Chotoy Spinetails are often observed alone or in pairs foraging for arthropods, while Grey-bellied Spinetails are more secretive and often detected by their vocalizations.

Habitat

Chotoy Spinetail is found in open areas of the Chaco and Espinal ecoregions, whereas the Grey-bellied Spinetail is confined to the undergrowth of taller forests in the Atlantic Forest.

Voice

Chotoy Spinetail has a guttural, low-pitched series of notes, characteristic of its regions, while the Grey-bellied Spinetail's vocalizations are key to its detection due to its secretive nature.