Biology:Ladder-backed woodpecker

Short description: Species of bird

Ladder-backed woodpecker
Adult male outside cavity
Conservation status
Least Concern (IUCN 3.1)
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)
Synonyms
Dendrocopos scalaris Picoides scalaris

The ladder-backed woodpecker (Dryobates scalaris) is a North American woodpecker.

Description

Comparison of ladder-backed (above) and Nuttall's woodpecker

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.

Female - South Padre Island, Texas

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.

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  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

• 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. https://archive.org/details/guidetobirdsofme0000howe. 

External links

• Ladder-backed woodpecker, a bibliographic resource

Wikidata ☰ Q27074907 entry