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Merlin Bird ID

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    Arctic Tern Identification

    The Four Keys to ID

    • Size & Shape

      Arctic Terns are slender terns with long, angular wings and pointed wingtips. They have a small round head with a steep forehead and extremely short legs. Breeding adults have a deeply forked tail.

      Relative Size

      Larger than a Least Tern, smaller than a Caspian Tern.

      Relative Sizebetween robin and crowbetween robin and crow
      Measurements
      • Both Sexes
        • Length: 11.0-15.3 in (28-39 cm)
        • Weight: 3.2-4.2 oz (90-120 g)
        • Wingspan: 25.6-29.5 in (65-75 cm)