Nuttall's woodpecker
| Nuttall's woodpecker | |
|---|---|
 |
|
| Male in California, USA | |
 |
|
| Female in California | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Piciformes |
| Family: | Picidae |
| Genus: | Dryobates |
| Species: | D. nuttallii |
| Binomial name | |
|
Dryobates nuttallii (Gambel, 1843) |
|
 |
|
| Range of P. nuttallii | |
| Synonyms | |
|
Dendrocopos nuttallii |
|
Dendrocopos nuttallii
Picoides nuttallii
Nuttall's woodpecker (Dryobates nuttallii) is a species of woodpecker named after naturalist Thomas Nuttall in 1843. They are found in oak woodlands of California and are similar to the ladder-backed woodpecker in both genetics and appearance.
Nuttall’s woodpecker has black wings and tail feathers with white barring. On the ventral surface, colour is white with black spots and barring. It has a black forehead with white streaks on the sides and an unbarred black region at the top of the back. Adult males have a distinguishable red crown which females do not. However, this physical feature is present in the juvenile of both sexes. They have zygodactyl feet and stiff tail feathers which allows them to maintain a vertical position on trees; typical of woodpeckers. The mass of the Nuttall’s woodpecker ranges from 30 to 45 g (1.1 to 1.6 oz), with a body length of 16 to 18 cm (6.3 to 7.1 in).
The Nuttall’s woodpecker is closely related to the ladder-backed woodpecker of Arizona, New Mexico, Texas, and Mexico. The Nuttall's likely evolved via allopatric speciation when the two species were separated into smaller ranges by dry climate during the glaciation. Hybrids of the two species exist but are rare. Some taxonomic authorities, including the American Ornithological Society, continue to place this species in the genus Picoides.
Nuttall’s are a non-migratory species with a geographic range confined to northern California extending south towards the northwest region of Baja California, Mexico. Their preferred habitat is arid to mesic woodlands. In particular, these woodpeckers prefer oak woodlands, although they also occur in riparian sites and chaparral in the most southern parts of its range because of the decrease in oak abundance. Individuals are found from sea level to 1,250 m (4,100 ft), rarely to 2,000 m (6,600 ft).
The birds are not considered globally threatened although the range is restricted to the California Endemic Bird Area. They are fairly common in California with a total world population estimated at over 100,000 individuals (density of about 20 birds per square kilometer in San Bernardino County). Surveys suggest no obvious population trends.
...
Wikipedia