Floreana mockingbird

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Floreana mockingbird
Mimus trifasciatus, Floreana, Galapagos 1.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Mimidae
Genus: Mimus
Species:
M. trifasciatus
Binomial name
Mimus trifasciatus
(Gould, 1837)
Mimus trifasciatus map.svg
Synonyms
  • Nesomimus trifasciatus

The Floreana mockingbird (Mimus trifasciatus) or the Charles Island mockingbird, is a species of bird in the family Mimidae. It was endemic to Floreana, one of the Galápagos Islands, but now is found only on two nearby islets, Campeón and Gardner-near-Floreana. [2] [3] [4] The Floreana mockingbird is also known as Darwin's mockingbird, as it was the arguable inspiration for Charles Darwin's work on the origins of species; he noticed distinct differences between them and previous species he had encountered and consequently established the existence of other variants on neighboring islands. [5]

Contents

Taxonomy and systematics

The Floreana mockingbird, Galapagos mockingbird (Mimus parvulus), Espanola mockingbird (M. macdonaldi), and San Cristobal mockingbird (M. melanotis) were previously placed in genus Nesomimus and were considered conspecific. They now form a superspecies. The Floreana mockingbird is monotypic. [2] [3] [4]

Description

The Floreana mockingbird is 25 to 26 cm (9.8 to 10.2 in) long. Males weigh an average of 65.7 g (2.32 oz) and females 59.8 g (2.11 oz). Adults have a pied appearance. They have a pale supercilium, a black patch in front of the eye, a darkish one below it, and white cheeks. Their crown, upperparts, and tail are grayish brown with a few faint darker streaks. Their whitish underparts have a dark patch on the side of the breast and faint spots on the breast and flanks. The folded wing shows two white bars. The juvenile is similar to the adult but more heavily streaked. [3]

Distribution and habitat

The Floreana mockingbird was formerly abundant on Floreana Island but had been extirpated from there by 1888. It now occurs only on two islets off Floreana's shore, Campeón and Gardner-near-Floreana. The islets provide a habitat of low vegetation along their shores and arid scrub with cacti and a few trees inland. [3]

Behavior

Feeding

The Floreana mockingbird mostly forages on the ground, but also in vegetation. It is primarily insectivorous but also eats cactus fruit, carrion, and probably seabird eggs. [3]

Breeding

The Floreana mockingbird's breeding season spans from October to April and two broods are usual. It is a cooperative breeder with up to five adults in each territory of about 2 ha (4.9 acres). The nest is a cup made of twigs lined with finer material; it is almost always placed in a cactus. The clutch size is two to four. [3]

Vocalization

The Floreana mockingbird has a "[l]oud, melodious song [and] does not mimic other species." [3]

Status

The IUCN in 1994 initially assessed the Floreana mockingbird as Endangered. In 2008 it was reclassified as Critically Endangered but then in 2017 returned to Endangered status. It was extirpated from Floreana by 1888; introduced rats, mice, cats, dogs, and goats have all been implicated as causes. The population on the two islets has fluctuated with the presence or absence of El Niño events but is believed to exceed 250 individuals and be stable. [1] [3]

Repopulation efforts

Studies are under way to attempt to reintroduce the Floreana mockingbird to the main island. These include assessments of Floreana's habitat and the status of the introduced predators and competitors. [6] [7]

Related Research Articles

<span class="mw-page-title-main">Galápagos Islands</span> Ecuadorian archipelago and protected area

The Galápagos Islands are an archipelago of volcanic islands in the Eastern Pacific, located around the Equator 900 km (560 mi) west of the mainland of South America. They form the Galápagos Province of the Republic of Ecuador, with a population of slightly over 33,000 (2020). The province is divided into the cantons of San Cristóbal, Santa Cruz, and Isabela, the three most populated islands in the chain. The Galápagos are famous for their large number of endemic species, which were studied by Charles Darwin in the 1830s and inspired his theory of evolution by means of natural selection. All of these islands are protected as part of Ecuador's Galápagos National Park and Marine Reserve.

<span class="mw-page-title-main">Mimid</span> Family of birds

The mimids are the New World family of passerine birds, Mimidae, that includes thrashers, mockingbirds, tremblers, and the New World catbirds. As their name suggests, these birds are notable for their vocalization, especially some species' remarkable ability to mimic a wide variety of birds and other sounds heard outdoors. They are commonly referred to as mimic thrushes but are not, in fact, thrushes.

<span class="mw-page-title-main">Mockingbird</span> Family of birds

Mockingbirds are a group of New World passerine birds from the family Mimidae. They are best known for the habit of some species mimicking the songs of other birds and the sounds of insects and amphibians, often loudly and in rapid succession and for being extremely territorial when raising hatchlings. Studies have shown the ability of some species to identify individual humans and treat them differently based on learned threat assessments.

<span class="mw-page-title-main">Darwin's finches</span> Group of related bird species in the Galápagos Islands

Darwin's finches are a group of about 18 species of passerine birds. They are well known for being a classic example of adaptive radiation and for their remarkable diversity in beak form and function. They are often classified as the subfamily Geospizinae or tribe Geospizini. They belong to the tanager family and are not closely related to the true finches. The closest known relative of the Galápagos finches is the South American dull-coloured grassquit. They were first collected when the second voyage of the Beagle visited the Galápagos Islands, with Charles Darwin on board as a gentleman naturalist. Apart from the Cocos finch, which is from Cocos Island, the others are found only on the Galápagos Islands.

<span class="mw-page-title-main">Tropical mockingbird</span> Species of bird

The tropical mockingbird is a resident breeding bird from southern Mexico to northern and eastern South America and in the Lesser Antilles and other Caribbean islands.

<span class="mw-page-title-main">Floreana Island</span> Island in Ecuadors Galápagos Archipelago

Floreana Island is a southern island in Ecuador's Galápagos Archipelago. The island has an area of 173 km2 (67 sq mi). It was formed by volcanic eruption. The island's highest point is Cerro Pajas at 640 m (2,100 ft), which is also the highest point of the volcano like most of the smaller islands of Galápagos. The island has a population of about 100.

<span class="mw-page-title-main">Dark-billed cuckoo</span> Species of bird

The dark-billed cuckoo is a species of bird in the tribe Phaenicophaeini, subfamily Cuculinae of the cuckoo family Cuculidae. It is regularly found in every mainland South American country except Chile plus the Galápagos Islands. It has also occurred as a vagrant in Chile and several other countries and islands.

<span class="mw-page-title-main">Paint-billed crake</span> Species of bird

The paint-billed crake is a species of bird in the subfamily Rallinae of the rail, crake, and coot family Rallidae. It is found in Costa Rica, Panama, every mainland South American country except Chile and Uruguay, and the Galápagos Islands.

<span class="mw-page-title-main">Apolinar's wren</span> Species of bird

Apolinar's wren is a passerine bird in the family Troglodytidae. It is endemic to Colombia.

<span class="mw-page-title-main">Brown-backed mockingbird</span> Species of bird

The brown-backed mockingbird is a species of bird in the family Mimidae. It is found in Argentina and Bolivia.

<i>Mimus</i> Genus of birds

Mimus is a bird genus in the family Mimidae. It contains the typical mockingbirds. In 2007, the genus Nesomimus was merged into Mimus by the American Ornithologists' Union. The genus name is Latin for "mimic".

<span class="mw-page-title-main">Bahama mockingbird</span> Species of bird

The Bahama mockingbird is a species of bird in the family Mimidae. It is found in the Bahamas, Cuba, Jamaica and the Turks and Caicos Islands, and is a vagrant to Florida.

<span class="mw-page-title-main">Long-tailed mockingbird</span> Species of bird

The long-tailed mockingbird is a species of bird in the family Mimidae. It is found in Ecuador and Peru.

<span class="mw-page-title-main">Patagonian mockingbird</span> Species of bird

The Patagonian mockingbird is a species of bird in the family Mimidae. It is found in much of Argentina and locally in Chile.

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

The white-banded mockingbird is a species of bird in the family Mimidae. It is found in Argentina, Bolivia, Brazil, Chile, Paraguay, and Uruguay.

<span class="mw-page-title-main">Hood mockingbird</span> Species of bird

The Hood mockingbird, also known as the Española mockingbird, is a species of bird in the family Mimidae. It is endemic to Española Island in the Galápagos Islands, Ecuador, and it is one of four closely related mockingbird species endemic to the Galápagos archipelago. It is found in dry forests and is omnivorous, though it primarily is a carnivore or scavenger. The species has a highly territorial social structure and has no fear of humans. It is the only species of Galápagos mockingbird that Charles Darwin did not see or collect on the voyage of HMS Beagle.

<span class="mw-page-title-main">San Cristóbal mockingbird</span> Species of bird

The San Cristóbal mockingbird or Chatham mockingbird, is a species of bird in the family Mimidae. It is endemic to San Cristóbal Island in the Galápagos Islands.

<span class="mw-page-title-main">Galápagos mockingbird</span> Species of bird

The Galápagos mockingbird is a species of bird in the family Mimidae. It is endemic to the Galápagos Islands, Ecuador.

References

  1. 1 2 BirdLife International (2018). "Floreana Mockingbird Melanotis trifasciatus". IUCN Red List of Threatened Species . 2018. Retrieved 24 July 2021.
  2. 1 2 Gill, F.; Donsker, D.; Rasmussen, P. (July 2021). "IOC World Bird List (v 11.2)" . Retrieved July 14, 2021.
  3. 1 2 3 4 5 6 7 8 Cody, M. L. and C. J. Sharpe (2020). Floreana Mockingbird (Mimus trifasciatus), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.chamoc1.01 retrieved July 24, 2021
  4. 1 2 Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 23 May 2021. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved May 24, 2021
  5. "Darwin's mockingbirds knock finches off perch".
  6. Gill, Victoria (November 18, 2009). "DNA clue to save rare Darwin bird".
  7. Gupta, Avani (2019). "Project update: Floreana mockingbird". Galapagos Conservation Trust. Retrieved July 24, 2021.