Iduna caligata
The Booted Warbler (*Iduna caligata*) is a small, rather drab passerine bird belonging to the family Acrocephalidae, often referred to as 'Old World warblers.' Measuring approximately 11.5-13 cm (4.5-5.1 in) in length with a wingspan of 16-19 cm (6.3-7.5 in) and weighing 7-13 grams, it exhibits typical warbler characteristics: brownish-grey upperparts, pale whitish underparts, and a distinctive, often faint, pale supercilium contrasted by a darker eyestripe. A subtle pale panel on the folded ...
This warbler prefers open scrubland, shrubby steppes, forest edges, and areas with dense, low vegetation, often near wetlands or riverine thickets, typically at low to moderate elevations.
Primarily insectivorous, feeding on a wide range of small invertebrates including beetles, flies, moths, caterpillars, and spiders, usually gleaned from foliage or caught in flight.
Booted Warblers are diurnal and actively forage during daylight hours, often keeping low in dense vegetation. They are insectivorous gleaners, methodically searching leaves and branches for prey, and will also sally out to catch flying insects in short, agile pursuits. Males are highly territoria...
The Booted Warbler's breeding range spans a vast area from western Russia (with occasional records in Fennoscandia and Eastern Europe) across southern Siberia and Central Asia, extending eastwards to Mongolia and parts of western China. During the breeding season, they favor arid or semi-arid scr...
Least Concern
- The name 'Booted' refers to its proportionally long and robust tarsus (lower leg bone), a subtle but distinguishing structural feature among similar warblers. - Its plain plumage and similarity to species like Sykes's Warbler make it a notoriously difficult bird to identify in the field without...