Ecology

Habitat

Habitat and Ecology

Systems
  • Terrestrial
  • Freshwater
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2012

Assessor/s
BirdLife International

Reviewer/s
Butchart, S. & Symes, A.

Contributor/s

Justification
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
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Population

Population
The global population size has not been quantified, but this species is described as 'fairly common' (Stotz et al. (1996).

Population Trend
Stable
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Wikipedia

White-bearded manakin

The white-bearded manakin (Manacus manacus) is a small passerine bird which breeds in tropical South America. It is found from Colombia, Venezuela and Trinidad south to Bolivia and northern Argentina.

This manakin is a fairly common bird of forests, second growth and plantations. The female builds a shallow cup nest low in a tree; two brown-mottled white eggs are laid, and incubated entirely by the female for about 18–19 days, with a further 13–15 days to fledging. The young are fed mainly on regurgitated fruit with some insects.

Like other manakins, white-bearded manakin is a compact, brightly coloured forest bird, typically 10.7 centimetres (4.2 in) long and weighing 16.5 grams (0.58 oz). The adult male has a black crown, upper back wings and tail, and the plumage is otherwise white. He has orange legs.

The female and young males are olive-green and resemble female golden-headed manakins, but they have orange legs. The race endemic to Trinidad, M. m. trinitatis is larger than mainland birds, and the female has yellower underparts.

Female on nest in Brazil

The male white-bearded manakin has a fascinating breeding display at a communal lek. Each male clears a patch of forest floor to bare earth, and perches on a bare stick. The display consists of rapid leaps between sticks and the ground, accompanied by a loud wing snap, the whirring of the wings, and a chee-poo call. Groups of up to 70 birds may perform together, the largest leks being in Trinidad.

Apart from the buzzing display song, white-bearded manakin has a number of other calls, including a trilled musical peeerr.

These manakins eat fruit and some insects.

Range: Amazon Basin, etc[edit]

In South America, two thirds of white-bearded manakin's range is in the combined Amazon Basin, the Guianas, and the Orinoco River drainage of Venezuela; also eastern Colombia. Three disjunct populations occur: Pacific coastal Ecuador, with southwestern Colombia; coastal and inland western Venezuela with northwestern Colombia; and the largest, southeastern Brazil, with inland regions bordering Paraguay in the south, and from Paraná state to coastal Pernambuco in the northeast.

Only one area of the Amazon Basin does not have the species, the 2200 km Purus River region in southwestern Amazonas state.

References[edit]

  • Hilty, Steven L (2003). Birds of Venezuela. London: Christopher Helm. ISBN 0-7136-6418-5. 
  • ffrench, Richard (1991). A Guide to the Birds of Trinidad and Tobago (2nd edition ed.). Comstock Publishing. ISBN 0-8014-9792-2. 
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