- 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 DescriptionImmature resembles winter adult, but has even darker primaries. May have dark centers to tertials.
Relative Sizebetween robin and crow
- Both Sexes
- Length: 13.0-14.2 in (33-36 cm)
- Weight: 4.6-6.7 oz (130-190 g)