Cassin's Auklet Identification

Adult Description

  • Small seabird.
  • Stocky, with round head and little neck.
  • Dark gray above and below.
  • White crescents above and below eyes.
  • Short, thick, upturned bill, with pale base to lower mandible.

Immature Description

Similar to adult.
Relative Size

Relative Sizerobin sizedrobin-sized
Measurements
  • Both Sexes
    • Length: 9.1 in (23 cm)
    • Weight: 5.3-7.0 oz (150-200 g)