The Eastern Subalpine Warbler, Curruca cantillans, is a diminutive and sprightly member of the typical warbler family, Sylviidae. It is a bird that graces the southern reaches of Europe with its presence. The species was first described by the German naturalist Peter Simon Pallas in the year 1764.
The adult male Eastern Subalpine Warbler is adorned with a grey back and head, contrasting with brick-red underparts, and distinguished by white malar streaks, often referred to as "moustaches". The female, however, presents a more subdued palette, being mainly brown above with a greyer head, and below she is whitish with a delicate pink flush.
This species is a denizen of dry open country, often favoring hill slopes adorned with shrubbery suitable for nesting.
The Eastern Subalpine Warbler is a bird that has chosen the southernmost areas of Europe as its breeding ground.
The Eastern Subalpine Warbler is monogamous, with breeding occurring from late March to late June. The male engages in the construction of several 'cock nests', though the final breeding nest is a collaborative effort between both sexes. This nest is a robust structure, placed within low scrub or bushes, and typically contains a clutch of three to five eggs.
The song of the Eastern Subalpine Warbler is a fast and rattling melody, bearing a resemblance to the song of the Lesser Whitethroat.
The breeding nest is a deep cup made of grasses, thin roots, and leaves, lined with finer materials. It is situated 30 to 130 cm above the ground in low scrub, a bush, or a small tree.
The diet of the Eastern Subalpine Warbler is primarily composed of small insects and their larvae. However, outside the breeding season, it also partakes in berries and fruits.
The IUCN Red List has classified the Eastern Subalpine Warbler as Least Concern, indicating that, for now, this species is not at immediate risk of decline.