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Overview

Comprehensive Description

Medium, closer to Little than Great Egret; bill noticeably shorter, yellow; legs and toes black. Adult: Summer/ breeding: short breast plumes, long back plumes; bill black. Winter/non-breeding: bill yellow with blackish tip. It looks similar to the Great Egret, but is smaller, has a more rounded head and the orange bill is shorter and not so acute angled. The neck is about the same length as the body. In breeding plumage they have deep pink to red bill, blue-green facial skin and long breast plumes and long wing plumes extending beyond the tail.

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© New Guinea Birds

Source: Birds of Papua New Guinea

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Distribution

Range

Japan to s India and Greater Sundas.
  • 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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Subspecies and Distribution:


    *brachyrhyncha (A. E. Brehm, 1854) - Africa S of Sahara. *intermedia (Wagler, 1829) - SE Asia and W Indonesia N to Japan. *plumifera (Gould, 1848) - E Indonesia to New Guinea and Australia.


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© New Guinea Birds

Source: Birds of Papua New Guinea

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Physical Description

Size

68-71cm

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© New Guinea Birds

Source: Birds of Papua New Guinea

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Diagnostic Description

Description

Length: 61-69 cm. Plumage: white; long plumes on back and breast when breeding. Immature like non-breeding adult. Bare parts: iris yellow, ruby red in breeding bird; lores and eye-ring yellow, green in breeding bird; bill deep yellow, red with orange tip in breeding birds; feet and legs black except tarsi which are red when breeding and yellow when not breeding. Habitat: edges of estuaries, lagoons and inland waters. <388><393><391>
  • Brown, L.H., E.K. Urban & K. Newman (1982). The Birds of Africa, Volume I. Academic Press, London.
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© WoRMS for SMEBD

Source: World Register of Marine Species

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Medium, closer to Little than Great Egret; bill noticeably shorter, yellow; legs and toes black. Adult: Summer/ breeding: short breast plumes, long back plumes; bill black. Winter/non-breeding: bill yellow with blackish tip. It looks similar to the Great Egret, but is smaller, has a more rounded head and the orange bill is shorter and not so acute angled. The neck is about the same length as the body. In breeding plumage they have deep pink to red bill, blue-green facial skin and long breast plumes and long wing plumes extending beyond the tail.

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© New Guinea Birds

Source: Birds of Papua New Guinea

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Ecology

Habitat

Habitat and Ecology

Systems
  • Terrestrial
  • Freshwater
  • Marine
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© International Union for Conservation of Nature and Natural Resources

Source: IUCN

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They prefer to hunt in freshwater (marshes, cultivated fields), but are also found in mangroves, mudflats, estuaries. They prefer to roost in reedbeds, but will also roost in mangroves.

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© New Guinea Birds

Source: Birds of Papua New Guinea

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Trophic Strategy

Intermediate Egrets eat small fish, frogs and insect. They stalk for their prey on mud, grass or shallow water.

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© New Guinea Birds

Source: Birds of Papua New Guinea

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Life History and Behavior

Behavior

VOICE: A quiet bird. Described as a deep kroa-kr when taking off.

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© New Guinea Birds

Source: Birds of Papua New Guinea

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Reproduction

The nest is a small platform of sticks built in a tree overhanging the water. Lays 3-5 pale green eggs.

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© New Guinea Birds

Source: Birds of Papua New Guinea

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Ardea intermedia

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

Source: Barcode of Life Data Systems (BOLD)

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Barcode data: Egretta intermedia

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There is 1 barcode sequence available from BOLD and GenBank.

Below is the sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.

See the BOLD taxonomy browser for more complete information about this specimen.

Other sequences that do not yet meet barcode criteria may also be available.

NNNNNNNNNNNNNNNNNNNNNNNNNNNTGGCATAATTGGCACTGCCCTAAGCCTACTCATCCGAGCTGAACTTGGCCAACCAGGAACACTCCTAGGAGACGACCAAATCTACAATGTAATCGTCACTGCCCATGCCTTCGTAATAATCTTCTTTATAGTCATGCCAATCATAATTGGAGGCTTCGGAAATTGACTAGTCCCGCTTATAATTGGGGCCCCAGACATAGCATTCCCACGCATAAACAACATAAGCTTCTGACTCCTACCACCATCATTCATACTCCTCCTAGCTTCATCCACGGTCGAAGCAGGAGCAGGTACAGGCTGAACAGTCTACCCACCATTAGCTGGTAACCTGGCTCATGCTGGAGCCTCAGTAGACCTGGCCATCTTCTCCCTTCACCTAGCAGGTGTATCTTCCATTCTAGGGGCAATTAACTTCATTACAACTGCCATCAACATAAAACCTCCAGCCCTATCACAATATCAAACCCCCCTATTCGTATGGTCTGTCCTAATTACTGCTGTCTTACTCTTACTCTCACTCCCAGTCCTTGCCGCAGGCATTACAATACTACTGACCGACCGAAACCTAAACACCACATTCTTTGACCCTGCTGGAGGCGGCGACCCAGTTCTCTACCAACATCTCTTCTGATTCTTCGGCCACCTAGAAGNNNNNNNNNNNNNNNNN
-- end --

Download FASTA File

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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Statistics of barcoding coverage: Egretta intermedia

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 4
Specimens with Barcodes: 13
Species With Barcodes: 1
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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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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
2014

Assessor/s
BirdLife International

Reviewer/s
Butchart, S.

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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© International Union for Conservation of Nature and Natural Resources

Source: IUCN

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Not Threatened.

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© New Guinea Birds

Source: Birds of Papua New Guinea

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Population

Population
The global population has not been quantified owing to recent taxonomic splits.

Population Trend
Decreasing
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© International Union for Conservation of Nature and Natural Resources

Source: IUCN

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Threats

Major Threats
This species has declined markedly in Japan since the 1960s due to pollution and the disturbance of nesting colonies (Hancock and Kushlan 1984, del Hoyo et al. 1992).
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Source: IUCN

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