Which subspecies of *N. p. phaeopus* breeds in northeastern Siberia and winters as far east as Australia?
Answer
*N. p. variegatus*
The text outlines several recognized subspecies groups within the *Numenius phaeopus* designation (Old World populations), each tied to specific migratory routes. The subspecies *N. p. variegatus* is specifically geographically characterized by breeding in the northeastern regions of Siberia. Its migratory pattern is distinct because its wintering grounds extend far to the east, reaching Australia. This geographical link between a specific breeding area (northeastern Siberia) and a far eastern wintering area (Australia) is the identifier for *variegatus*.

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