Search results
Results from the WOW.Com Content Network
The pileated woodpecker (/ ˈ p aɪ l i ˌ eɪ t ə d w ʊ d p ɛ k ər, p ɪ-/, Dryocopus pileatus) is a large, mostly black woodpecker native to North America. An insectivore , it inhabits deciduous forests in eastern North America, the Great Lakes , the boreal forests of Canada , and parts of the Pacific Coast .
The acorn woodpecker (Melanerpes formicivorus) is a medium-sized woodpecker with a length of around 20 cm (8 in), [2] and an average weight of 85 g (3.0 oz). [ citation needed ] It is found across Central America , as well as North into the western United States and South into parts of Colombia .
Binomial name. Dryocopus lineatus. (Linnaeus, 1766) Subspecies. 5 subspecies, see text. Synonyms [3] Picus lineatus Linnaeus, 1766. Hylatomus lineatus (Linnaeus, 1766) The lineated woodpecker (Dryocopus lineatus) is a very large woodpecker which is a resident breeding bird from southern Mexico to northern Argentina and Trinidad in the Caribbean.
The closely related imperial woodpecker (C. imperialis) of western Mexico is the largest woodpecker in the world. The ivory-billed woodpecker has a total length of 48 to 53 cm (19 to 21 in) and, based on scant information, weighs approximately 450 to 570 g (0.99 to 1.26 lb). Its wingspan is typically 76 cm (30 in).
The Nuttall's woodpecker is closely related to the ladder-backed woodpecker of Arizona, New Mexico, Texas, and Mexico. [4] [page needed] [full citation needed] The Nuttall's likely evolved via allopatric speciation when the two species were separated into smaller ranges by dry climate during the Pleistocene glaciation.
Pattern search (also known as direct search, derivative-free search, or black-box search) is a family of numerical optimization methods that does not require a gradient. As a result, it can be used on functions that are not continuous or differentiable. One such pattern search method is "convergence" (see below), which is based on the theory of ...
The golden-fronted woodpecker is 22 to 26 cm (8.7 to 10 in) long and weighs 65 to 102 g (2.3 to 3.6 oz). Males and females have the same plumage except for the pattern on their heads. Adult males have a red crown and a golden orange to yellow nape with a gap between them; females have a grayish crown and a paler yellow nape.
The Cuban ivory-billed woodpecker (Spanish: carpintero real) [1] (Campephilus principalis bairdii) is a subspecies of the ivory-billed woodpecker native to Cuba.Originally classified as a separate species, recent research has indicated that C. p. bairdii may, in fact, be sufficiently distinct from the nominate subspecies to once again be regarded as a species in its own right.