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)