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Aguiguan Reed Warbler - BirdForum Opus

Skull2 t.png The species Aguiguan Reed Warbler is possibly extinct.
Skull2 t.png

Acrocephalus nijoi


17cm (6¾ in)

  • Yellowish underparts
  • Darker brownish-yellow upperparts
  • Large and very long bill


Formerly endemic to Aguiguan Island (Mariana Islands) in the Pacific Ocean.
Up to 6 birds recorded in the 1980s, no records since.


This is a monotypic species[1].
It was formerly considered conspecific with Nightingale Reed Warbler.


Groves and thickets.


No information available on diet or breeding habits.


  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2019. The eBird/Clements Checklist of Birds of the World: v2019. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Gill, F and D Donsker (Eds). 2011. IOC World Bird Names (version 2.10). Available at http://www.worldbirdnames.org/.
  3. (2020)Aguiguan Reed Warbler (Acrocephalus nijoi), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.agurew1.01

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