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Overview

Brief Summary

The Silky Anteater (Cyclopes didactylus, family Cyclopedidae) - also known as the Pygmy Anteater - is the smallest of all anteaters , weighing only 300 grams as an adult. It is extremely difficult to observe in the wild because it is only active at night and moves through the canopy without descending to the ground.

The Silky Anteater is distributed throughout the Amazonian rainforest. An isolated, genetically distinct population exists in the northeastern Atlantic forest of Brazil and is regionally classified as ‘Critically Endangered’. This population is particularly threatened by habitat destruction, as deforestation is advancing at a fast pace. Locals also frequently capture Silky Anteaters to keep them as pets.
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Distribution

Range Description

This subpopulation of the Silky Anteater (Cyclopes didactylus) occurs in coastal northeastern Brazil, in the states of Paraíba, Pernambuco, Alagoas and Rio Grande do Norte (Miranda and Superina, submitted). It is isolated from the main Silky Anteater population by approximately 1,000 km.
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Range Description

C. didactylus ranges from Mexico (Veracruz and Oaxaca) in the north, south into Colombia from where it ranges west of the Andes to southern Ecuador, and east of the Andes into Venezuela, Trinidad Island, Guyana, Suriname, French Guiana, Brazil (Acre state east to western Maranhão state), and as far south as Bolivia (La Paz and Santa Cruz) (Gardner 2007). The species has not been recorded from El Salvador and it is unclear if the species was ever present there. It has been recorded from sea level up to 1,500 m asl. There is a population of C. didactylus on the northeastern coast of Brazil; it is evaluated separately due to its isolation from the main population.
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Geographic Range

The Cyclopes didactylus can be found in forests from Southern Mexico to Bolivia. It can also be found in Brazil.

Biogeographic Regions: neotropical (Native )

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Physical Description

Morphology

Physical Description

Average mass: 266 g.

Average basal metabolic rate: 0.636 W.

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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
The northeastern subpopulation of C. didactylus is restricted to tropical moist lowland forests. Nothing is known about the biology or ecology of this smallest of all anteaters.

Systems
  • Terrestrial
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Habitat and Ecology

Habitat and Ecology
This nocturnal and arboreal species occurs in semi-deciduous and evergreen tropical moist lowland forest, gallery forest, and mangrove forest. It can be found in secondary forest habitat. Adults are solitary; the home range of a male overlaps the home range of three females (Montgomery 1983). The females give birth to a single young once per year.

Systems
  • Terrestrial
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Habitat

Cyclopes didactylus inhabits the tree Ceiba, which has large seed pods that contain masses of a silky silverish fiber. This serves as an excellent camouflage for this tiny anteater, because the sheen of the pods and the silky fur of the anteater are almost identical. The silky anteater needs this protection becasue its predators include the harpy-eagle, eagle-hawks and the spectacled owl -- all of which have excellent vision. The silky anteater is arboreal and very rarely descends to the ground.

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Trophic Strategy

Food Habits

The silky anteater is strictly insectivorous. It feeds mostly on arboreal ants and termites (white ants), but has been known to occasionally eat coccinellid beetles (Best). The anteater will eat on average 100 to 8000 ants per day. Cyclopes didactylus is an oppurtunistic feeder that forages among the treetops and invades ants nests with its long sticky tongue.

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Life History and Behavior

Life Expectancy

Lifespan/Longevity

Average lifespan

Status: captivity:
2.3 years.

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Lifespan, longevity, and ageing

Observations: While the average lifespan of these animals is below 2 years, it is likely they live much longer in captivity. One animal was kept for 2.3 years in captivity (Ronald Nowak 1999). Nonetheless, without further longevity studies, the maximum longevity of this species cannot be determined.
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Reproduction

Reproduction

Gestation of the silky anteater is between 120 and 150 days. It gives birth to a single young that the mother will place in a nest of dry leaves in a hole in a tree trunk. The young is raised by both parents, and the male sometimes carries the young on his back. Both parents feed the young by regurgitating semi-digested insects for it to eat.

Average gestation period: 135 days.

Average number of offspring: 1.

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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2011

Assessor/s
Miranda, F. & Superina, M.

Reviewer/s
Meritt, D. & Bermúdez Larrazabal, L.

Contributor/s

Justification
There is no doubt that rapid and ongoing deforestation of the Atlantic Forest is negatively affecting the northeastern population of Cyclopes didactylus, as the species cannot survive in the sugar cane plantations that are replacing the native vegetation in this area and the remaining patches of suitable habitat are increasingly fragmented. It is therefore highly probable that this population requires listing in a threatened category. The lack of basic data on its ecology, population size and density, however, currently do not allow a realistic assessment of its conservation status. The northeastern population of C. didactylus is therefore classified as Data Deficient. Field studies are urgently needed to confirm the taxonomic status of this population and to obtain sufficient information for an appropriate assessment of its conservation status.
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IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2011

Assessor/s
Miranda, F. and Meritt, D.A.Jr.

Reviewer/s
Bermúdez Larrazabal, L. & Superina, M.

Contributor/s
Tirira, D. & Arteaga, M.

Justification
C. didactylus is listed as Least Concern in view of its wide distribution, presumed large population, its occurrence in a number of protected areas, its tolerance of a degree of habitat modification, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category.

History
  • 2006
    Least Concern
    (IUCN 2006)
  • 1996
    Lower Risk/least concern
    (Baillie and Groombridge 1996)
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Conservation Status

IUCN Red List of Threatened Species: least concern

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Population

Population
No data are available on the population size or density of this isolated population of C. didactylus. Ongoing deforestation is likely to further decimate the wild population of this smallest of all anteaters.

Population Trend
Decreasing
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Population

Population
Not much is known about the wild populations of C. didactylus.

Population Trend
Unknown
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Threats

Threats

Major Threats
The northeastern population of C. didactylus is severely threatened by rapid deforestation of its suitable habitat (Atlantic Forest) due to the increase in sugar cane plantations, which, in addition to direct habitat loss, also leads to habitat fragmentation and degradation. Only five percent of the original extent of suitable habitat remain intact (Galindo-Leal and De Gusmão Câmara 2003). The current area of Atlantic Forest in the range states amounts to approximately 3,000 km² (Campanili and Prochnow 2006). Furthermore, Silky Anteaters are captured for illegal trade (F. Miranda pers. comm. 2010).
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Threats

Major Threats
Although general deforestation is taking place over many parts of the range, C. didactylus remains widespread in the Amazon Basin and there are currently no major threats to the survival of this small anteater. In some areas it is captured and kept as a pet species, although it usually does not survive long in captivity.
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Management

Conservation Actions

Conservation Actions
There are no State or National parks within the range of the northeastern Brazil subpopulation of C. didactylus.
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Conservation Actions

Conservation Actions
C. didactylus is present in a number of protected areas.
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Wikipedia

Silky Anteater

The Silky Anteater or Pygmy Anteater (Cyclopes didactylus) is a species of anteater from Central and South America, ranging from extreme southern Mexico south to Brazil, Delta Amacuro, Venezuela and possibly Paraguay. It is the only living species in the genus Cyclopes and the family Cyclopedidae.

It is the smallest member of the anteaters, with a total length ranging from 360 to 450 millimetres (14 to 18 in) and usually weighing less than 400 grams (14 oz). It has a dense and soft golden brown fur, short snout, partially prehensile tail and two very enlarged claws in each forepaw.

Contents

Classification

There are six recognized subspecies:

Behaviour

CyclothurusDorsalisWolf.jpg

It is a nocturnal and arboreal animal,[3] found in lowland rainforests with continuous canopy where they can move to different places without the need to descend from trees.[3] It can occur at fairly high densities of 0.77 individuals/ha, for example, in some areas. Females have smaller home ranges than males.

The Silky Anteater is a slow moving animal and feeds mainly on ants, between 100 and 8,000 a day.[3] Sometimes it can also feed on other insects, such as termites and small coccinellid beetles.[3] The Silky Anteater defecates once a day.[3] Some of those feces, examined by scientists, showed a large quantity of exoskeleton fragments of insects, indicating that the Silky Anteater does not possess either chitinase or chitobiase,[3] digestive enzymes found in insectivorous bats.

It is a solitary animal and gives birth to a single young that is usually placed inside a nest of dead leaves built in tree holes.[3]

Silky anteater sleeping, Damas Island, Costa Rica

Some authors suggest that the Silky Anteater usually dwells in silk cotton trees (genus Ceiba).[3][4] Because of its resemblance to the seed pod fibers of these trees, it can use the trees as camouflage[3] and avoid attacks of predators such as hawks and, especially, harpy eagles. During the day they typically sleep curled up in a ball. Although they are rarely seen in the forest, it is said that they can be found more easily when they are foraging on lianas at night.

When threatened, the Silky Anteater, like other anteaters, defends itself by standing on its hind legs and holding its forefeet close to its face so it can strike any animal that tries to get close with its sharp claws.[3]

References

  1. ^ Gardner, Alfred L. (16 November 2005). "Order Pilosa (pp. 100-103)". In Wilson, Don E., and Reeder, DeeAnn M., eds. Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press, 2 vols. (2142 pp.). p. 102. ISBN 978-0-8018-8221-0. OCLC 62265494. http://www.bucknell.edu/msw3/browse.asp?id=11800028. 
  2. ^ Miranda, F. & Meritt, D. A. Jr. (2011). "Cyclopes didactylus". IUCN Red List of Threatened Species. Version 2011.2. International Union for Conservation of Nature. http://www.iucnredlist.org/apps/redlist/details/6019. Retrieved 18 January 2012. 
  3. ^ a b c d e f g h i j Bartoz, Suzy1; Cerda, Anthony (2009). "Silky Anteater". Benedictine University. http://www.ben.edu/museum/silky_anteater.asp. Retrieved 16 Aug. 2009. [dead link]
  4. ^ "Silky Anteater". WildMagazine. http://www.wildinfo.net/facts/Silkyanteater.asp. Retrieved February 2012. 
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