Slender-billed xenops
Slender-billed xenops | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Passeriformes |
Family: | Furnariidae |
Genus: | Xenops |
Species: | X. tenuirostris
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Binomial name | |
Xenops tenuirostris Pelzeln, 1859
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The slender-billed xenops (Xenops tenuirostris) is a species of
Taxonomy and systematics
The slender-billed xenops has three subspecies, the
Description
The slender-billed xenops is 10 to 11.5 cm (3.9 to 4.5 in) long and weighs 9 to 11 g (0.32 to 0.39 oz). Its namesake bill is wedge-shaped, and longer and thinner than those of other xenops. The sexes are alike. Adults of the nominate subspecies have a blackish brown face with a dark brown crown that is spotted and streaked buff, a buffish white
Subspecies X. t. acutirostris has a darker back with larger streaks than the nominate, darker and more grayish olive underparts with wider whitish streaks, and a more slender bill. X. t. hellmayri more closely resembles the nominate, though its crown is slightly darker with more distinct streaks, its supercilium, neck, and throat are bright buff, and its underparts more brownish.[3][5][6]
Distribution and habitat
Subspecies X. t. acutirostris of the slender-billed xenops is found from western Guayana, southern Venezuela, and southeastern Colombia south through eastern Ecuador into northeastern Peru. X. t. hellmayri is found in Suriname and French Guiana. X. t. tenuirostris is found from southeastern Peru and northern Bolivia east into Brazil south of the Amazon River to Pará state. However, there is evidence that some populations may be mis-assigned: Birds in Venezuela do not closely resemble others of acutirostris, and those in Guyana might belong to hellmayri.[3]
The slender-billed xenops inhabits humid lowland and flooded evergreen forest. In most of its range it occurs below 600 m (2,000 ft) but it reaches 900 m (3,000 ft) in Colombia and locally to 1,500 m (4,900 ft) in the Andean foothills.[3][4][5][6]
Behavior
Movement
The slender-billed xenops is a year-round resident throughout its range.[3]
Feeding
The slender-billed xenops' diet is almost entirely
Breeding
Nothing is known about the slender-billed xenops' breeding biology.[3]
Vocalization
The slender-billed xenops' song is a series of four or five notes variously described as "tseep"[4] and "tsip"[6].
Status
The
References
- ^ . Retrieved 15 August 2023.
- Rasmussen, Pamela, eds. (July 2023). "Ovenbirds, woodcreepers". IOC World Bird List. v 13.2. Retrieved July 31, 2023.
- ^ a b c d e f g h Remsen, Jr., J. V. (2020). Slender-billed Xenops (Xenops tenuirostris), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.slbxen1.01 retrieved August 15, 2023
- ^ ISBN 978-0-19-530155-7.
- ^ ISBN 978-0-9827615-0-2.
- ^ ISBN 978-0-8014-8721-7.