Jacamar

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Jacamars
Rufous-tailed jacamar (Galbula ruficauda) male 2.JPG
Rufous-tailed jacamar (Galbula ruficauda)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Piciformes
Suborder: Galbuli
Family: Galbulidae
Vigors, 1825
Genera

Galbalcyrhynchus
Brachygalba
Jacamaralcyon
Galbula
Jacamerops

Contents

The jacamars are a family, Galbulidae, of near passerine birds from tropical South and Central America, extending up to Mexico. The family contains five genera and 18 species. The family is closely related to the puffbirds, another Neotropical family, and the two families are often separated into their own order, Galbuliformes, separate from the Piciformes. They are principally birds of low-altitude woodlands and forests, and particularly of forest edge and canopy.

Taxonomy

The placement of the combined puffbird and jacamar lineage was in question, with some bone and muscle features suggesting they may be more closely related to the Coraciiformes. However, analysis of nuclear DNA in a 2003 study placed them as sister group to the rest of the Piciformes, also showing that the groups had developed zygodactyl feet before separating. [1] Per Ericson and colleagues, in analysing genomic DNA, confirmed that puffbirds and jacamars were sister groups and their place in Piciformes. [2]

Description

The jacamars are small to medium-sized perching birds, 14–34 cm (5.5–13.4 in) in length and weighing 17–75 g (0.60–2.65 oz). They are elegant, glossy birds with long bills and tails. In appearance and behaviour they resemble the Old World bee-eaters, as most aerial insectivores tend to have short, wide bills rather than long, thin ones. The legs are short and weak, and the feet are zygodactylic (two forward-pointing toes, two backward-pointing). Their plumage is often bright and highly iridescent, although it is quite dull in a few species. There are minor differences in plumage based on sex, males often having a white patch on the breast. [3]

Behaviour

Diet and feeding

Jacamars are insectivores, taking a variety of insect prey (many specialize on butterflies and moths) by hawking in the air. Birds sit in favoured perches and sally towards the prey when it is close enough. Only the great jacamar varies from the rest of the family, taking prey by gleaning and occasionally taking small lizards and spiders. [3]

Breeding

The breeding systems of jacamars have not been studied in depth. They are thought to generally be monogamous, although a few species are thought to engage in cooperative breeding sometimes, with several adults sharing duties. The family nests in holes either in the soil or in arboreal termite mounds. Ground-nesting species usually nest in the banks of rivers (or, more recently, roads), although if these are not available they will nest in the soil held by the roots of fallen trees. Bank-nesting jacamars can sometimes be loosely colonial. Clutch sizes are between one and four eggs, and usually more than one. Both parents participate in incubation. Little is known about the incubation times of most species, but it lasts between 19 and 26 days in the rufous-tailed jacamar. Chicks are born with down feathers, unique among the piciformes. [3]

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<span class="mw-page-title-main">White-eared jacamar</span> Species of bird

The white-eared jacamar is a species of bird in the family Galbulidae. It is found in Brazil, Colombia, Ecuador and Peru.

<i>Galbula</i> Genus of birds

Galbula is the type and largest genus of the jacamar family (Galbulidae) of piciform birds, and its suborder Galbulae. Sometimes, the Piciformes are split in two, with the Galbulae upranked to full order Galbuliformes.

<span class="mw-page-title-main">Three-toed jacamar</span> Species of bird

The three-toed jacamar is a species of bird in the family Galbulidae. It is monotypic within the genus Jacamaralcyon.

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The great jacamar is a species of bird in the family Galbulidae. It is placed in the monotypic genus Jacamerops. It is found in Bolivia, Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guyana, Panama, Peru, Suriname, and Venezuela, where its natural habitat is subtropical and tropical moist lowland forests.

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Pici is one of the two suborders of the order Piciformes. It includes two infraorders, Ramphastides and Picides. Members of this suborder have been called "true piciforms", as the jacamars of Galbulidae and puffbirds of Bucconidae were for a time thought to be not closely related to toucans and woodpeckers, but instead to the order Coraciiformes. However, analysis of nuclear DNA confirmed that Galbuli and Pici are sister groups, and thus their similarities such as zygodactyl feet were inherited from their common ancestor. Some classifications continue to treat Galbuli as a separate order (Galbuliformes), in which case Piciformes becomes equivalent in scope to Pici.

<span class="mw-page-title-main">Galbuli</span> Suborder of birds

Galbuli is one of the two suborders of the order Piciformes. It includes two families, Bucconidae (puffbirds) and Galbulidae (jacamars), both restricted to the Neotropics.

References

  1. Johansson, Ulf S.; Ericson, Per G.P. (2003). "Molecular support for a sister group relationship between Pici and Galbulae (Piciformes sensu Wetmore 1960" (PDF). Journal of Avian Biology. 34 (2): 185. doi:10.1034/j.1600-048X.2003.03103.x.
  2. Ericson, P. G. P.; Anderson, C. L.; Britton, T.; Elzanowski, A.; Johansson, U. S.; Källersjö, M.; Ohlson, J. I.; Parsons, T. J.; Zuccon, D.; Mayr, G. (2006). "Diversification of Neoaves: integration of molecular sequence data and fossils". Biology Letters. 2 (4): 543–547. doi:10.1098/rsbl.2006.0523. PMC   1834003 . PMID   17148284.
  3. 1 2 3 Tobias, J.; Züchner T. & T.A. de Melo Júnior (2002) "Family Galbulidae (Jacamars)". in del Hoyo, J.; Elliot, A. & Sargatal, J. (editors). (2002). Handbook of the Birds of the World. Volume 7: Jacamars to Woodpeckers. Lynx Edicions. ISBN   84-87334-37-7