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Ladder-backed Woodpecker

From Opus

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Revision as of 22:50, 12 September 2011 (edit)
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-{{incomplete}}+[[Image:Ladder-backed Woodpecker male.jpg|thumb|400px|right|Male ''D. s. cactophilus''<br />Photo &copy; by {{user|Stanley+Jones|Stanley Jones}} <br />Edinburg Scenic Wetlands, Edinburg, Hidalgo County, [[Texas]], [[USA]], April 2019]]
- +;[[:Category:Dryobates|Dryobates]] scalaris<br />
-;[[:Category:Picoides|Picoides]] scalaris+''Picoides scalaris; Dendrocopos scalaris; Picus scalaris''
-[[Image:ladder-backed_woodpecker.jpg|thumb|550px|right|Photo by {{user|Gary+Clark|Gary Clark}} <br/>Male on left, Female on right. Location: [[Whitewater Draw]], [[Arizona]], [[USA]] ]]+
==Identification== ==Identification==
-16.5 to 19 cm (6½ to 7½ inches) in length. Black and white, barred pattern on back and wings. Rump, breast and flanks speckled with black. Adult males have a red crown patch that is smaller in immatures and lacking in adult females. +[[Image:Ladder-backed_Woodpecker,_Femalebobsofpa.jpg|thumb|350px|right|Female ''D. s. cactophilus''<br />Photo &copy; by {{user|bobsofpa|bobsofpa}} <br />Ash Canyon, [[Arizona]], [[USA]], 29 April 2010]]
 +16.5 to 19 cm (6½ to 7½ inches) in length<br />
 +Straight black bill
 +*Black and white, barring on back and wings
 +*Black spotted, white underparts and rump<br />
 +Adult males
 +*Red crown to nape (smaller in immatures)
 +*Buff forehead
 +*Black forecrown with red feather tips<br />
 +Adult female has a black crown
 +====Similar Species====
 +[[Nuttall's Woodpecker]] is similar but darker with broader dark bars across back and face.
 + 
==Distribution== ==Distribution==
South-western [[United States]], [[Mexico]], and [[Nicaragua]]. South-western [[United States]], [[Mexico]], and [[Nicaragua]].
==Taxonomy== ==Taxonomy==
 +====Subspecies====
 +There are 8 subspecies<sup>[[#References|[1]]]</sup>:
 +*''D. s. cactophilus'':
 +:*Arid south-western [[US]] to north-eastern Baja California and central [[Mexico]]
 +*''D. s. eremicus'':
 +:*Northern Baja California
 +*''D. s. lucasanus'':
 +:*Southern Baja California
 +*''D. s. graysoni'':
 +:*Tres Marías Islands (off western Mexico)
 +*''D. s. sinaloensis'':
 +:*Coastal western Mexico (southern Sonora to Guerrero, south-western Puebla, western Oaxaca)
 +*''D. s. scalaris'':
 +:*Southern Mexico (Veracruz and Chiapas)
 +*''D. s. parvus'':
 +:*North Yucatán Peninsula, Cozumel Island and Holbox Island
 +*''D. s. leucoptilurus'':
 +:*[[Belize]], [[Guatemala]] and [[El Salvador]] to north-eastern [[Nicaragua]]
 +
==Habitat== ==Habitat==
-Dry brushy areas and thickets. +Deserts and open woodland in very dry areas; also woods along seasonally dry water courses.
==Behaviour== ==Behaviour==
-They nest in cavities excavated from tree trunks. 2 and 7 plain white eggs are laid and incubated by both sexes.+====Breeding====
-Diet includes insects and their larva, and also fruit produced by cacti.+They nest in cavities excavated in tree trunks. Their clutch contains 2 to 7 plain white eggs which are incubated by both adults.
- +====Diet====
 +Their diet consists mostly of insects, invertebrates and their larva, such as beetles, caterpillars and ants; they also eat some fruit.
 +==References==
 +#{{Ref-Clements6thAug18}}#[https://avibase.ca/2CE418F2 Avibase]
 +#Handbook of the Birds of the World Alive (retrieved May 2019)
 +{{ref}}
==External Links== ==External Links==
-{{GSearch|Picoides+scalaris}}+{{GSearch|Woodpecker+scalaris}}
-[[Category:Birds]] [[Category:Picoides]]+[[Category:Birds]] [[Category:Dryobates]]

Current revision

Male D. s. cactophilusPhoto © by Stanley Jones Edinburg Scenic Wetlands, Edinburg, Hidalgo County, Texas, USA, April 2019
Male D. s. cactophilus
Photo © by Stanley Jones
Edinburg Scenic Wetlands, Edinburg, Hidalgo County, Texas, USA, April 2019
Dryobates scalaris

Picoides scalaris; Dendrocopos scalaris; Picus scalaris

Contents

[edit] Identification

Female D. s. cactophilusPhoto © by bobsofpa Ash Canyon, Arizona, USA, 29 April 2010
Female D. s. cactophilus
Photo © by bobsofpa
Ash Canyon, Arizona, USA, 29 April 2010

16.5 to 19 cm (6½ to 7½ inches) in length
Straight black bill

  • Black and white, barring on back and wings
  • Black spotted, white underparts and rump

Adult males

  • Red crown to nape (smaller in immatures)
  • Buff forehead
  • Black forecrown with red feather tips

Adult female has a black crown

[edit] Similar Species

Nuttall's Woodpecker is similar but darker with broader dark bars across back and face.

[edit] Distribution

South-western United States, Mexico, and Nicaragua.

[edit] Taxonomy

[edit] Subspecies

There are 8 subspecies[1]:

  • D. s. cactophilus:
  • Arid south-western US to north-eastern Baja California and central Mexico
  • D. s. eremicus:
  • Northern Baja California
  • D. s. lucasanus:
  • Southern Baja California
  • D. s. graysoni:
  • Tres Marías Islands (off western Mexico)
  • D. s. sinaloensis:
  • Coastal western Mexico (southern Sonora to Guerrero, south-western Puebla, western Oaxaca)
  • D. s. scalaris:
  • Southern Mexico (Veracruz and Chiapas)
  • D. s. parvus:
  • North Yucatán Peninsula, Cozumel Island and Holbox Island
  • D. s. leucoptilurus:

[edit] Habitat

Deserts and open woodland in very dry areas; also woods along seasonally dry water courses.

[edit] Behaviour

[edit] Breeding

They nest in cavities excavated in tree trunks. Their clutch contains 2 to 7 plain white eggs which are incubated by both adults.

[edit] Diet

Their diet consists mostly of insects, invertebrates and their larva, such as beetles, caterpillars and ants; they also eat some fruit.

[edit] References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2018. The eBird/Clements checklist of birds of the world: v2018. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Avibase
  3. Handbook of the Birds of the World Alive (retrieved May 2019)

[edit] External Links

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