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Ladder-backed Woodpecker

From Opus

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Revision as of 07:46, 24 April 2019 (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]]
-[[Image:Ladder-Backed_Woodpeckerdigishooter.jpg|thumb|400px|right|Male<br />Photo by {{user|digishooter|digishooter}} <br />Kelso Valley: Kern Co., [[California]], [[USA]], November 2006]]+
;[[:Category:Dryobates|Dryobates]] scalaris<br /> ;[[:Category:Dryobates|Dryobates]] scalaris<br />
''Picoides scalaris; Dendrocopos scalaris; Picus scalaris'' ''Picoides scalaris; Dendrocopos scalaris; Picus scalaris''
- 
- 
==Identification== ==Identification==
 +[[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 /> 16.5 to 19 cm (6½ to 7½ inches) in length<br />
-Black and white, barred pattern on back and wings. Rump, breast and flanks speckled with black.<br />+Straight black bill
-Adult males have a red crown patch that is smaller in immatures and lacking in adult females. The bill is very sharp, straight, and black.+*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==
-[[Image:Ladder-backed_Woodpecker,_Femalebobsofpa.jpg|thumb|350px|right|Female<br />Photo by {{user|bobsofpa|bobsofpa}} <br />Ash Canyon, [[Arizona]], [[USA]], April 2010]] 
-Placed in genus ''[[:Category:Dryobates|Dryobates]]'' by Gill and Donsker. 
====Subspecies==== ====Subspecies====
There are 8 subspecies<sup>[[#References|[1]]]</sup>: There are 8 subspecies<sup>[[#References|[1]]]</sup>:
Line 35: Line 39:
==Habitat== ==Habitat==
-Dry brushy areas and thickets. +Deserts and open woodland in very dry areas; also woods along seasonally dry water courses.
==Behaviour== ==Behaviour==
====Breeding==== ====Breeding====
-They nest in cavities excavated from tree trunks. 2 and 7 plain white eggs are laid and incubated by both sexes.+They nest in cavities excavated in tree trunks. Their clutch contains 2 to 7 plain white eggs which are incubated by both adults.
====Diet==== ====Diet====
-Diet includes insects and their larva, and also fruit produced by cacti.+Their diet consists mostly of insects, invertebrates and their larva, such as beetles, caterpillars and ants; they also eat some fruit.
==References== ==References==
-#{{Ref-Clements6thAug18}}#Avibase+#{{Ref-Clements6thAug18}}#[https://avibase.ca/2CE418F2 Avibase]
 +#Handbook of the Birds of the World Alive (retrieved May 2019)
{{ref}} {{ref}}
==External Links== ==External Links==
{{GSearch|Woodpecker+scalaris}} {{GSearch|Woodpecker+scalaris}}
[[Category:Birds]] [[Category:Dryobates]] [[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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