Old World Warblers (Sylviidae)

Thick-billed Warbler (Acrocephalus aedon) - HBW 11, p. 634

French: Rousserolle à gros bec German: Dickschnabel-Rohrsänger Spanish: Carricero Picogordo
Other common names: Thick-billed Reed-warbler

Taxonomy: Muscicapa Aëdon Pallas, 1776, south-eastern Transbaikalia, eastern Siberia, Russia.
Sometimes placed in a separate genus, Phragmaticola; when so treated, earlier name rufescens (which preoccupied in present genus) can be used for E race stegmanni. Relationships uncertain; further research needed. Races intergrade. Two subspecies recognized.

Subspecies and Distribution:

  • aedon (Pallas, 1776) - breeds SC Siberia (from Tomsk E to Kansk, S to L Teletskoy in Altai and to E Sayan Mts) and adjacent NW Mongolia; non-breeding Nepal and E & S India E to Myanmar and Thailand.
  • stegmanni Watson, 1985 - breeds E Siberia and NE Mongolia E to Sea of Japan, S to NE China; non-breeding S China, Thailand and Indochina.

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