Ladder-backed woodpecker
Ladder-backed woodpecker | |
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Adult male outside cavity | |
Conservation status | |
![]() Least Concern (IUCN 3.1)[1] | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Piciformes |
Family: | Picidae |
Genus: | Dryobates |
Species: | D. scalaris |
Binomial name | |
Dryobates scalaris (Wagler, 1829) | |
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Synonyms | |
Dendrocopos scalaris |
The ladder-backed woodpecker (Dryobates scalaris) is a North American woodpecker.
Description
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/88/Picoides_scalaris_nuttalliiAQBIP03CA.jpg/220px-Picoides_scalaris_nuttalliiAQBIP03CA.jpg)
The ladder-backed woodpecker is a small woodpecker about 16.5 to 19 cm (6½ to 7½ inches) in length. It is primarily colored black and white, with a barred pattern on its back and wings resembling the rungs of a ladder. Its rump is speckled with black, as are its cream-colored underparts on the breast and flanks. Southern populations have duskier buff breasts and distinctly smaller bills. Adult males have a red crown patch that is smaller in immatures and lacking in adult females. The ladder-backed woodpecker is very similar in appearance to Nuttall's woodpecker, but has much less black on its head and upper back, and the range of the two species only intersects a minimal amount in southern California and northern Baja California. Hybrids are known.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Ladder-backed_Woodpecker_Tex.jpg/220px-Ladder-backed_Woodpecker_Tex.jpg)
Ladder-backed woodpeckers nest in cavities excavated from tree trunks, or in more arid environments a large cactus will do. The female lays between 2 and 7 eggs, which are plain white. The eggs are incubated by both sexes, but the nesting period and other details are unknown.
Like most other woodpeckers the ladder-backed woodpecker bores into tree-trunks with its chisel-like bill to hunt for insects and their larva, but it also feeds on fruit produced by cacti.
- Juvenile male showing ladder back
Range and habitat
The ladder-backed woodpecker is fairly common in dry brushy areas and thickets and has a rather large range. The species can be found year-round over the southwestern United States (north to extreme southern Nevada and extreme southeastern Colorado), most of Mexico, and locally in Central America as far south as Nicaragua.
References
- ^ BirdLife International (2017). "Dryobates scalaris". The IUCN Red List of Threatened Species. 2017. IUCN: e.T22681152A118587827. doi:10.2305/IUCN.UK.2017-3.RLTS.T22681152A118587827.en. Retrieved 14 January 2018.
- Howell, Steve N. G.; Sophie Webb (1995). A Guide to the Birds of Mexico and Northern Central America. Oxford University Press. ISBN 0-19-854012-4.
External links
![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
- Ladder-backed woodpecker, a bibliographic resource