Willow Tit
Poecile montanus
Active little inhabitant of coniferous and mixed forest, birch woodland, willow and alder scrub. Very similar to Marsh Tit, and often best separated by its differently whistled song (more helpful in western range than in eastern). Gives various high-pitched and scolding calls; generally narrower vocal range than Marsh Tit. Often in scrubbier habitats than Marsh Tit; sometimes visits feeders. On Willow Tit, note pale wing panel (vs. rather plain wings of Marsh), slightly larger and messier black bib, and brighter buffy flanks.
Identification
The willow tit is 11.5 cm (4.5 in) in length, has a wingspan of 17–20.5 cm (6.7–8.1 in) and weighs around 11 g (0.39 oz). It has a large head, a thin bill, a long dull black cap that descends to the mantle and a black bib. The sides of the face are white, the back is grey-brown and the underparts are buff. The sexes are similar in appearance.<p>In the east of its range it is much paler than marsh tit, but as one goes west the various races become increasingly similar, so much so that it was not recognised as a breeding bird in Great Britain until the end of the 19th century, despite being widespread.<p>The willow tit is distinguished from the marsh tit by a sooty brown instead of a glossy blue black cap; the general colour is otherwise similar, though the under parts are more buff and the flanks distinctly more rufous; the pale buff edgings to the secondaries form a light patch on the closed wing. The feathers of the crown and the black bib under the bill are longer, but this is not an easily noticed character.<p>The commonest call is a nasal zee, zee, zee, but the notes of the bird evidently vary considerably. Occasionally a double note, ipsee, ipsee, is repeated four or five times.
Taxonomy
The willow tit was described in 1827 by the Swiss naturalist Thomas Conrad von Baldenstein under the trinomial name Parus cinereus montanus. The type locality is the mountain forests in the Canton of Grisons, Switzerland. The willow tit is now placed in the genus Poecile that was erected by the German naturalist Johann Jakob Kaup in 1829. The genus name, Poecile, is the Ancient Greek name for a now unidentifiable small bird, and the specific montanus is Latin for "of the mountains".<p>Poecile was at one time treated as a subgenus within the genus Parus but molecular taxonomic analysis, using both nuclear and mitochondrial genes, supports Poecile as a distinct clade. Within Poecile, most of the Old World species (including the willow tit) form a separate clade from the New World chickadees. The taxonomic analysis has shown that the willow tit is sister to the Caspian tit (Poecile hyrcanus).<p>There are 14 recognised subspecies:<p>The Sichuan tit (Poecile weigoldicus) was formerly treated as a subspecies of the willow tit. It was promoted to species status based on a 2002 phylogenetic analysis that compared DNA sequences from the mitochondrial cytochrome-b gene. The single locus results were later confirmed by a larger multi-locus analysis published in 2017.
- Scientific name
- Poecile montanus
- Authority
- (Conrad von Baldenstein, 1827)
- Order
- Passeriformes
- Family
- Paridae
- Genus
- Poecile
Range and habitat
- Migration
- Vertical migration
Behavior
Migration pattern: Vertical migration.
Conservation
Population trend: declining.
- Population trend
- declining
Photos
Bird Calls
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