A distinctive, very small seabird, slim in all proportions, with long, narrow wings, trim body, and slender, sharp bill.
Larger than a Tree Swallow, smaller than a Forster's Tern.between robin and crow
- Both Sexes
- Length: 8.3-9.1 in (21-23 cm)
- Weight: 1.3-1.9 oz (36-54 g)
- Wingspan: 18.9-20.9 in (48-53 cm)