| Chestnut-headed nunlet | |
|---|---|
Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Piciformes |
| Genus: | Nonnula |
| Species: | N. amaurocephala |
| Binomial name | |
| Nonnula amaurocephala Chapman, 1921 | |
 | |
Thechestnut-headed nunlet (Nonnula amaurocephala) is a species ofnear-passerinebird in the familyBucconidae, the puffbirds, nunlets, and nunbirds. It isendemic toBrazil.[2]
The chestnut-headed nunlet ismonotypic. It, therufous-capped nunlet (N. ruficapilla), and thegrey-cheeked nunlet (N. frontalis) form asuperspecies.[3][4]
The chestnut-headed nunlet is 14 to 15 cm (5.5 to 5.9 in) long and weighs 15 to 16 g (0.53 to 0.56 oz). Its entire head, upper mantle, breast, and upper belly are bright rufous. Its back, wings, and tail are plain dull brown; the rump has an olive wash. The rufous upper belly grades to whitish on the lower belly. The bill is mostly black, the eye red, and the feet lead gray.[4]
The chestnut-headed nunlet is found only in a small part of Brazil'sAmazonas state, north of theAmazon River and west of theNegro River. It almost exclusively inhabits the understory of seasonally floodedigapó forest, usually up to about 3 m (10 ft) above the ground but sometimes as high as 8 m (26 ft).[4]
The chestnut-headed nunlet has been observed sallying from a perch, presumably to catch invertebrate prey, but no details of its feeding behavior or diet have been published.[4]
No details of the chestnut-headed nunlet's breedingphenology have been published.[4]
No recordings or description of the chestnut-headed nunlet's vocalizations are available as of late 2021.
TheIUCN originally assessed the chestnut-headed nunlet in 1988 as Near Threatened but since 2004 has rated it as being ofLeast Concern. It has a very small range and unquantified population that is believed to be decreasing.[1] Itsigapó habitat is widespread and under little human pressure, and the species is probably undercounted due to its quiet and sedentary nature.[4]
