Ergaticus

Ergaticus
	Red warbler
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Parulidae
Genus:	Ergaticus; Baird, 1865
Species
	E. ruber; E. versicolor

Ergaticus was a genus of

conspecific

.

Both are average-sized warblers. Adult plumage is largely red, while juvenile plumage is largely "pinkish cinnamon-brown". The bill is small and narrow at the base even for a New World warbler. The tail is rounded and relatively long (Ridgway 1902). The songs consist of high-pitched chips and short trills (Howell and Webb 1995).

They live in forests at altitudes of 1,800 to 3,500 m (5,900 to 11,500 ft). They occur singly or in pairs and may join

mixed-species feeding flocks

(Howell and Webb 1995).

The nest is shaped like an old-fashioned oven with an opening to the top or side, made of pine needles, grass, or similar materials. It is placed on the ground or on a bank. Both can lay 3 or 4 eggs; the pink-headed warbler sometimes lays only 2. The eggs are off-white with reddish-brown and gray speckles (Howell and Webb 1995).

Taxonomy

genera. It is closest to the genus Cardellina, with which it shares a common ancestor, and slightly more distantly related to the genus Wilsonia.^[3]

There are two sister species, separated by the low-lying Isthmus of Tehuantepec, in the genus. The red warbler, E. ruber, is found in the Mexican highlands north of the isthmus. Its three

monotypic across its limited range.^[4]

Though they are separated by geography and differ considerably in

conspecific.^[5]

Ergaticus is the Latinized version of the Ancient Greek ergatikos, meaning "willing or able to work".^[6]

Species

Image	Scientific name	Common Name	Distribution
	Cardellina rubra	red warbler	highlands north of the Isthmus of Tehuantepec
	Cardellina versicolor	pink-headed warbler	south of the Isthmus, from the highlands of Chiapas, Mexico down into Guatemala.