The palmchat (''Dulus dominicus'') is a small, long-tailed

passerine A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped') which includes more than half of all bird species. Sometimes known as perching birds, passerines generally have an anisodactyl arrangement of their ...

bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...

, the only species in the genus ''Dulus'' and the family Dulidae

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to the

Caribbean The Caribbean ( , ; ; ; ) is a region in the middle of the Americas centered around the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean, mostly overlapping with the West Indies. Bordered by North America to the north, Central America ...

island of

Hispaniola Hispaniola (, also ) is an island between Geography of Cuba, Cuba and Geography of Puerto Rico, Puerto Rico in the Greater Antilles of the Caribbean. Hispaniola is the most populous island in the West Indies, and the second-largest by List of C ...

(split between the

Dominican Republic The Dominican Republic is a country located on the island of Hispaniola in the Greater Antilles of the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean. It shares a Maritime boundary, maritime border with Puerto Rico to the east and ...

and

Haiti Haiti, officially the Republic of Haiti, is a country on the island of Hispaniola in the Caribbean Sea, east of Cuba and Jamaica, and south of the Bahamas. It occupies the western three-eighths of the island, which it shares with the Dominican ...

). It is related to the

waxwing The waxwings are three species of passerine birds classified in the genus ''Bombycilla''. They are pinkish-brown and pale grey with distinctive smooth plumage in which many body feathers are not individually visible, a black and white eyestripe, ...

s, family

Bombycillidae The waxwings are three species of passerine birds classified in the genus ''Bombycilla''. They are pinkish-brown and pale grey with distinctive smooth plumage in which many body feathers are not individually visible, a black and white eyestripe ...

. Its name reflects its strong association with palms for feeding, roosting, and nesting. The palmchat is the

national bird This is a list of national birds, including official birds of overseas territories and other states described as nations. Most species in the list are officially designated. Some species hold only an "unofficial" status. The column is marked a ...

of the

Taxonomy

In 1760 the French zoologist

Mathurin Jacques Brisson Mathurin Jacques Brisson (; 30 April 1723 – 23 June 1806) was a French zoologist and natural philosophy, natural philosopher. Brisson was born on 30 April 1723 at Fontenay-le-Comte in the Vendée department of western France. Note that page 14 ...

included a description of the palmchat in his ''Ornithologie'' based on a specimen collected from the French colony of

Saint-Domingue Saint-Domingue () was a French colonization of the Americas, French colony in the western portion of the Caribbean island of Hispaniola, in the area of modern-day Haiti, from 1659 to 1803. The name derives from the Spanish main city on the isl ...

, modern Haiti. He used the French name ''Le tangara de S. Dominigue'' and the Latin ''Tangara Dominicensis''. The two stars (**) at the start of the section indicates that Brisson based his description on the examination of a specimen. Although Brisson coined Latin names, these do not conform to the

binomial system The binomial system () is a voting system that was used in the legislative elections of Chile between 1989 and 2013. The binomial system is the D'Hondt method with an open list where ''every'' constituency returns ''two'' (hence the name) rep ...

and are not recognised by the

International Commission on Zoological Nomenclature The International Commission on Zoological Nomenclature (ICZN) is an organization dedicated to "achieving stability and sense in the scientific naming of animals". Founded in 1895, it currently comprises 26 commissioners from 20 countries. Orga ...

. When the Swedish naturalist

Carl Linnaeus Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné,#Blunt, Blunt (2004), p. 171. was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming o ...

updated his ''

Systema Naturae ' (originally in Latin written ' with the Orthographic ligature, ligature æ) is one of the major works of the Sweden, Swedish botanist, zoologist and physician Carl Linnaeus (1707–1778) and introduced the Linnaean taxonomy. Although the syste ...

'' for the twelfth edition in 1766, he added 240 species that had been previously described by Brisson, with one of them being the palmchat. Linnaeus included a brief description, coined the

binomial name In taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, altho ...

''Tanagra dominica'' and cited Brisson's work. The palmchat is the only species placed in the genus ''Dulus'' that was introduced by the French ornithologist

Louis Pierre Vieillot Louis Pierre Vieillot (10 May 1748, Yvetot – 24 August 1830, Sotteville-lès-Rouen) was a French ornithologist. Vieillot is the author of the first scientific descriptions and Linnaean names of a number of birds, including species he collected ...

in 1816. The species is

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unisp ...

Description

Palmchats are about in length. They are olive-brown above, and heavily streaked with brown below. Their rumps, as well as the edges of their primary

feather Feathers are epidermal growths that form a distinctive outer covering, or plumage, on both avian (bird) and some non-avian dinosaurs and other archosaurs. They are the most complex integumentary structures found in vertebrates and an exa ...

s, are dark yellow-green. They have strong yellow bills and russet eyes. They lack the soft silky

plumage Plumage () is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, there can b ...

of the waxwings or

silky-flycatcher The silky-flycatchers are a small family, Ptiliogonatidae, of passerine birds. The family contains only four species in three genera. They were formerly lumped with waxwings and hypocolius in the family Bombycillidae, and they are listed in that ...

s. Adults show no

sexual dimorphism Sexual dimorphism is the condition where sexes of the same species exhibit different Morphology (biology), morphological characteristics, including characteristics not directly involved in reproduction. The condition occurs in most dioecy, di ...

; immature birds have dark throats.

Distribution and habitat

The species is endemic to the island of Hispaniola (in both Haiti and the Dominican Republic), and the adjacent Saona and

Gonâve Island Gonâve Island or Zile Lagonav (, ; also ''La Gonâve'') is an island of Haiti located west-northwest of Port-au-Prince in the Gulf of Gonâve. It is the largest of the Hispaniolan satellite islands. The island is an arrondissement (''Arrondis ...

s, where it is common and widespread. It inhabits areas from sea level to 1500 m asl where palm

savanna A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) biome and ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach th ...

s can be found, or other open areas with scattered trees. Where its food trees are present, it has adapted well to city parks and gardens.

Behaviour

Palmchats are very sociable birds, often seen in small flocks containing several pairs, which will roost closely together with their bodies in contact.

Breeding

The breeding season is mainly from March to June. The birds build large, messy, communal

nests A nest is a structure built for certain animals to hold eggs or young. Although nests are most closely associated with birds, members of all classes of vertebrates and some invertebrates construct nests. They may be composed of organic materi ...

of twigs in the crowns of palms (mainly Puerto Rico royal palms, ''Roystonea borinquena''). Occasionally, in the absence of palms, other trees or even

telephone pole A utility pole, commonly referred to as a transmission pole, telephone pole, telecommunication pole, power pole, hydro pole, telegraph pole, or telegraph post, is a column or post used to support overhead power lines and various other public util ...

s may be used. The whole nesting structure may be up to 2 m across, containing up to 30 adjoining nests with their own separate chambers and entrances. The females lay

clutches A clutch is a mechanical device that allows an output shaft to be disconnected from a rotating input shaft. The clutch's input shaft is typically attached to a motor, while the clutch's output shaft is connected to the mechanism that does the ...

of 2-4 thickly spotted, grey-purple

eggs An egg is an organic vessel in which an embryo begins to develop. Egg, EGG or eggs may also refer to: Biology * Egg cell, the female reproductive cell (gamete) in oogamous organisms Food * Eggs as food Places * Egg, Austria * Egg, Switzerland ...

Food

Palmchats feed on

fruit In botany, a fruit is the seed-bearing structure in flowering plants (angiosperms) that is formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate their seeds. Edible fruits in particular have long propaga ...

s and berries, including those of palms and of the gumbo-limbo tree, as well as on

flower Flowers, also known as blooms and blossoms, are the reproductive structures of flowering plants ( angiosperms). Typically, they are structured in four circular levels, called whorls, around the end of a stalk. These whorls include: calyx, m ...

s, especially those of

epiphytic An epiphyte is a plant or plant-like organism that grows on the surface of another plant and derives its moisture and nutrients from the air, rain, water (in marine environments) or from debris accumulating around it. The plants on which epiphyt ...

orchid Orchids are plants that belong to the family Orchidaceae (), a diverse and widespread group of flowering plants with blooms that are often colourful and fragrant. Orchids are cosmopolitan plants that are found in almost every habitat on Eart ...

Voice

They are voluble and noisy birds, with a large repertoire of gurgling and cheeping sounds constantly used in their social behaviour. With their loud whistles, they are able to imitate the calls of hawks and kestrels which may be a surprise coming from their tiny bodies. They are typically classified as songbirds, but hardly ever make a coherent song.

Conservation

The palmchat is a common species within its range of about , and highly adaptable. As it is not approaching the thresholds for the population decline criterion of the IUCN Red List (i.e., declining more than 30% in ten years or three generations), it has been evaluated as being of Least Concern.

References

External links

Don Roberson's Bird Families of the World
{{Taxonbar, from=Q845457 Birds described in 1766 Taxa named by Carl Linnaeus Endemic birds of Hispaniola Endemic birds of the Caribbean Endemic fauna of Hispaniola Birds of the Dominican Republic Birds of Haiti Birds of the Greater Antilles Birds of the Lesser Antilles National symbols of the Dominican Republic Bombycilloidea Extant Miocene first appearances