Overview

Distribution

Range Description

Dendroica angelae was only discovered in 1968 and is endemic to Puerto Rico (to USA) (Raffaele 1983). It was formerly considered to occur at four disjunct localities: in the east, the Sierra de Luquillo (El Yunque National Forest/Bosque Nacional del Caribe) and the Sierra de Cayey (Carite State Forest) and, in the west, the Cordillera Central (Maricao and Toro Negro Commonwealth Forests), but its existence at some of these sites has been questioned and it is now thought to be restricted to two widely separated locations: the Sierra de Luquillo and Maricao State Forest (Anadon-Irizarry 2006, Delannoy 2006). In optimal habitat it can be locally common, and although the population was previously thought to be no more than c.300 pairs (Curson et al. 1994), more accurate counts put the population at 1,830 individuals.
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Range

Montane elfin forests of e Puerto Rico.
  • Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2014. The eBird/Clements checklist of birds of the world: Version 6.9. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/

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Physical Description

Type Information

Type for Dendroica angelae Kepler & Parkes
Catalog Number: USNM 564584
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Birds
Sex/Stage: Male; Adult
Preparation: Skin: Whole; Alcoholic: Partial
Collector(s): C. Kepler
Year Collected: 1971
Locality: Sierra De Luquillo, On Ridge Between Rio Sabana and Rio Espiritu Santo Valleys, ca. 2.5 km W of Hwy 191, On El Toro Trail, Luquillo, Puerto Rico, North America
Elevation (m): 780
  • Type: Kepler & Parkes. January 1972. Auk. 89 (1): 3.
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Type for Dendroica angelae Kepler & Parkes
Catalog Number: USNM 564584
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Birds
Sex/Stage: Male; Adult
Preparation: Skin: Whole; Alcoholic: Partial
Collector(s): C. Kepler
Year Collected: 1971
Locality: Sierra De Luquillo, On Ridge Between Rio Sabana and Rio Espiritu Santo Valleys, ca. 2.5 km W of Hwy 191, On El Toro Trail, Luquillo, Puerto Rico, North America
Elevation (m): 780
  • Type: Kepler & Parkes. January 1972. Auk. 89 (1): 3.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Although it inhabits elfin or montane dwarf forest on ridges and summits, montane wet forest, and sometimes ranges to lower-elevation wet forest, it reaches its highest densities in Podocarpus dominated forest (Cruz and Delannoy 1984, Raffaele et al. 1998, Delannoy 2006). Preferred areas have a dense canopy with vines, high subcanopy and sparse understorey (Curson et al. 1994, Raffaele et al. 1998). It shows a string preference for undisturbed forest, but has been recorded in secondary habitats and plantations (Cruz and Delannoy 1984). Breeding takes place in March-June, and the nest is built in aerial leaf-litter trapped in vegetation or vines, usually close to the trunk, or in a tree cavity (Curson et al. 1994, Raffaele et al. 1998, Rodriguez-Mojica 2004).

Systems
  • Terrestrial
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Associations

Known predators

Dendroica angelae is prey of:
Buteo jamaicensis
Buteo platypterus
Accipiter striatus
Diptera
Secernentia nematodes

Based on studies in:
Puerto Rico, El Verde (Rainforest)

This list may not be complete but is based on published studies.
  • Waide RB, Reagan WB (eds) (1996) The food web of a tropical rainforest. University of Chicago Press, Chicago
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Dendroica angelae

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
VU
Vulnerable

Red List Criteria
D2

Version
3.1

Year Assessed
2012

Assessor/s
BirdLife International

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

Contributor/s
Rodriguez, R., Anadn, V., Delannoy, C. & Coln-Merced, R.

Justification
This species is listed as Vulnerable because it has a very small range and, were data to show that it is declining in population or range, it would be uplisted to Endangered.


History
  • Vulnerable (VU)
  • Vulnerable (VU)
  • Vulnerable (VU)
  • Lower Risk/near threatened (LR/nt)
  • Lower Risk/least concern (LR/lc)
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Population

Population
The population is estimated to number at least 1,800 mature individuals, based on censuses conducted using playback methods. This is roughly equivalent to at least 2,700 individuals in total.

Population Trend
Decreasing
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Threats

Major Threats
By the late 1940s, the natural vegetation of Puerto Rico had been reduced to c.6% of the island's land surface, but rapid regeneration of forest increased this figure to 31% in the early 1980s, a change which will probably benefit this species (Cruz and Delannoy 1984). However, Podocarpus dominated forest, which may be crucial to this species survival, makes up a tiny percentage of the total remaining forest and continues to destroyed by infrastructure projects, including tourism developments in protected areas (R. Rodriguez in litt. 2007). Natural disasters will continue to be a threat while the species's population and range remain so small.
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Management

Conservation Actions

Conservation Actions

Conservation Actions Underway
Both known areas area protected, and the species is probably secure as long as suitable habitat is maintained in these reserves (Cruz and Delannoy 1984). In July 2011 Sociedad Ornitolgica Puertorriquea (SOPI), in collaboration with BirdLife, started a project which aims to carry out surveys for the bird in the Carite Commonwealth Forest and surrounding, privately-owned, potential habitat to determine the presence of a potential third population (V. Anadon in litt. 2012).

Conservation Actions Proposed
Ensure the complete protection of the two sites where it persists. Assess the current distribution (especially by surveying away from known sites) and population. Research factors limiting range and population, and attempt to determine why it disappeared from parts of its former range. Protect private land where the species occurs through cooperative agreements with landowners (USFWS).
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