Woodpeckers of the World: Genus: Sphyrapicus

Sunday, 17 October 2010

Genus: Sphyrapicus

The genus Sphyrapicus comprises 4 species, commonly named the sapsuckers. They are: Williamson's Sapsucker Sphyrapicus thyroideus, Yellow-bellied Sapsucker Sphyrapicus varius, Red-naped Sapsucker Sphyrapicus nuchalis, Red-breasted Sapsucker Sphyrapicus ruber. As the name suggests, sapsuckers feed primarily on tree-sap. All species breed in North American and are (to varying degrees) migratory, some moving southwards as far as Central American in winter. Photo: Male Yellow-bellied Sapsucker, Central Park, NYC, USA, Bill Benish.

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Background

Woodpeckers, the Picidae, are Piciformes, an order that includes some of the oldest avian lineages. The Piciformes probably originated about 60 million years ago in the Tertiary period and became distinct from their closest relatives some 50 million years ago. Depending upon which taxonomy is followed, and the fact that the status of some species is unclear, around 240-260 woodpecker species probably exist globally. The Picidae includes three subfamilies: Jynginae (wrynecks), Picumninae (piculets) and the Picinae, the “true woodpeckers”. In terms of size, behaviour, distribution and the habitats they use, the Picinae are a fairly diverse group of birds with six distinct tribes. They are widespread and found from sea-level to high-altitudes but absent from the Arctic, Antarctica, Australia, New Zealand, Papua New Guinea, Madagascar and some other islands. Worldwide woodpeckers are usually, but not exclusively, associated with trees.