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In 2014, Eric Pasquet, et al. published a phylogeny based on examination of nuclear and mitochondrial DNA of 21 nuthatch species. The position of the beautiful nuthatch within the genus was not established with certainty, having a far lower statistical association than others in the model. Nevertheless, under the findings the species appears closest evolutionarily to three clades of nuthatches ...
The sizes of nuthatches vary, [7] from the large giant nuthatch, at 195 mm (7.7 in) and 36–47 g (1.3–1.7 oz), [22] to the small brown-headed nuthatch and the pygmy nuthatch, both around 100 mm (3.9 in) in length and about 10 g (0.35 oz). [23] Nuthatches are very vocal, using an assortment of whistles, trills and calls.
Przevalski's nuthatch (Sitta przewalskii), originally given the nomen nudum Sitta eckloni, is a bird species in the family Sittidae, collectively known as nuthatches. Long regarded as a subspecies of the white-cheeked nuthatch ( Sitta leucopsis ), it nevertheless differs significantly in morphology and vocalizations.
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The Algerian nuthatch or Kabyle nuthatch (Sitta ledanti) is a species of bird in the nuthatch family Sittidae. It is a medium-sized nuthatch, measuring between 11.5 cm (4.5 in) and 12.5 cm (4.9 in). The upperparts are bluish-grey. The male can be distinguished from the female by the black front of its crown.
The chestnut-vented nuthatch (Sitta nagaensis) is a species of bird in the nuthatch family Sittidae. It is a medium-sized nuthatch, measuring 12.5–14 cm (4.9–5.5 in) in length. The upperparts are a solid grey-blue, with a markedly black loral stripe. The underparts are uniform grey to buff from the throat to belly, with brick red on the ...
The blue nuthatch (Sitta azurea) is a bird species in the nuthatch family Sittidae.It is a medium-sized nuthatch, measuring 13.5 cm (5.3 in) in length. The species, which shows slight sexual dimorphism, has dramatic coloration unlike any other member of its genus.