Merlin Bird Graphic

Merlin Bird ID

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    Forster's Tern Identification

    Adult Description

    • A medium-sized tern.
    • White with black cap.
    • Tail long and deeply forked.
    • Wings very white in most plumages.
    • Legs orange and relatively long.

    Immature Description

    Immature resembles winter adult, but has even darker primaries. May have dark centers to tertials.
    Relative Size

    Relative Sizebetween robin and crowbetween robin and crow
    Measurements
    • Both Sexes
      • Length: 13.0-14.2 in (33-36 cm)
      • Weight: 4.6-6.7 oz (130-190 g)