A small seabird with a swallowlike shape: long, fairly broad wings and a short tail. Wilson's Storm-Petrels have long legs and their feet project beyond the tail tip. The head is small and round, with a short bill with tubelike nostrils on top.
Larger than a Barn Swallow, smaller than a Black Storm-Petrel.robin-sized
- Both Sexes
- Length: 5.9-7.9 in (15-20 cm)
- Weight: 1.0-1.8 oz (28-50 g)
- Wingspan: 13.4-16.5 in (34-42 cm)