Family Reed-warblers (Acrocephalidae)

Least Concern

Booted Warbler (Iduna caligata)


French: Hypolaïs bottée German: Buschspötter Spanish: Zarcero escita

Sylvia caligata

M. H. C. Lichtenstein

, 1823,

Ilek, Ural River, near Orenburg, south-west Russia


Formerly regarded as conspecific with I. rama, but they have apparently overlapping breeding ranges, and differ in mitochondrial DNA, song, habitat and morphology. Proposed race annectens (SE Altai) appears undiagnosable. Monotypic.


Extreme SE Finland, W & SW Russia E to Kazakhstan (except much of W & S), extreme NW China (Dzungaria), NW Mongolia and SC Siberia (upper R Yenisey and Chunskiy region); winters mainly in CE & SE India.

Descriptive notes

11–12·5 cm; 7–11 g. Small Hippolais with shortish bill, rounded crown and rather short, square tail; often resembles a Phylloscopus... read more


Song a fast warbling twitter without clear pattern or repetition of notes, voice a bit guttural,... read more


Steppe with low scrub (knee-high or a little higher) of spirea (Spiraea), pea species (... read more

Food and feeding

Mainly insects and other invertebrates; caterpillars taken in summer. In various studies, diet included such invertebrates as grasshoppers... read more


May–Jun or early Jul; one brood per year. Nest a well-built cup of plant stems, roots and soft twigs, placed on or near ground, or up... read more


Long-distance migrant. Entire population spends non-breeding season in India, on average somewhat... read more

Status and conservation

Not globally threatened. Common in forest-steppe and on Kirghiz steppe. Density of 5·5 pairs/ha recorded in SC Siberia; linear counts of 1–2 birds/km in areas... read more

Recommended citation

Svensson, L. (2019). Booted Warbler (Iduna caligata). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 23 May 2019).