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Thick-billed Warbler - BirdForum Opus

Alternative name: Thick-billed Reed Warbler

Photo by rockfowl
Beidaihe, Hebei, China, May 2005
Arundinax aedon

Acrocephalus aedon, Phragmaticola aedon, Phragamaticola aedon, Iduna aedon


16-17.5 cm

  • Unstreaked brown back
  • Buff underparts
  • Rounded forehead
  • Short pointed bill

Young birds are rich buff below
Sexes are identical


Asia: found in Russia, Siberia, Mongolia, China, Tibet, Nepal, India, Andaman and Nicobar Islands, Eastern and Western Himalayas, Bhutan and Hong Kong
Southeast Asia: Indochina, Myanmar, Laos, Vietnam, Cambodia, Thailand and Indonesia


Formerly placed in genus Acrocephalus and Iduna, and sometimes Phragmaticola [also spelt Phragamaticola].


There are 2 subspecies[1]:

  • A. a. aedon:
  • A. a. rufescens:
  • Eastern Siberia to Mongolia; winters to south-eastern China, Thailand and Indochina


Dense vegetation such as reeds, bushes and thick undergrowth; coastal scrub.



The nest is built into a low tree. The clutch consists of 5-6 eggs.


The diet includes insects but it will take other small prey.


  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, B.L. Sullivan, C. L. Wood, and D. Roberson. 2013. The eBird/Clements checklist of birds of the world: Version 6.8., with updates to August 2013. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Avibase
  3. Wikipedia

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