Merlin

Rock Ptarmigan Identification

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Adult Description

Medium to large chicken-like bird. Thick bodied. Tail moderately short, rounded, and black. Completely white in winter. Barred grayish brown in summer. Wings white.

Immature Description

Similar to adult.
Relative Size

Relative Sizecrow sizedcrow-sized
Measurements
  • Both Sexes
    • Length: 12.6-15.8 in (32-40 cm)
    • Weight: 15.5-22.6 oz (440-640 g)