Common Seabirds of Atlantic Canada Shearwaters Great Shearwater Manx Shearwater Sooty Shearwater Cory’s Shearwater White rump patch dark Dark cap Large and cap Dark body stocky No dark prominent head Yellow collar Pale patch bill and dark dark White collar under yellowhead belly wings bill

White broad under tail wings

Smaller than others Clean white underparts Northern Fulmar Sparrow-sized species that feed by tapping the surface of Storm-Petrels the water with their feet while still airborne Dark prominent eye Wilson’s Storm-Petrel Leach’s Storm-Petrel Notched tail

Wing beat shallow and stiff Square tail Large white (feet often rump patch extend beyond)

Jaegers and Skuas Adult Jaegers in non-breeding plumage and juveniles are difficult to distinguish from one another Pomarine Jaeger Parasitic Jaeger Long-tailed Jaeger Great Skua Hunchbacked and broad winged

Short pointy tail Long slender tail Short bill Long twisted tail White patch

Northern Gannet Phalaropes Red-necked Adult Immature Red Phalarope Phalarope Dark markings Bold red underparts under wing

Summer

Thicker bill White chin Streaked back Thinner bill

Pale grey back Winter

Photo credits: Bruce Mactavish, John Chardine, Brian Patteson, Sabina Wilhelm, Anna Calvert, Carina Gjerdrum, Dave Fifield, and Ian Jones. Update 2017 Common Seabirds of Atlantic Canada Black wing-tipped Gulls Herring Gull Great Black-backed Gull Black-legged Kittiwake Adult Adult Has brownish Breeding adult Winter adult head in winter

Dark patch Marbled More uniform behind underwing brown than eye coverts immature Great Black- backed Gull

Bold Yellow bill black Dark wing tips wing Immature pattern look like they (1st winter) were “dipped Immature in ink” (2nd or 3rd winter)

Black bill in 1st winter and black Black bill nd Immature tip in 2 winter for both species (1st winter)

White wing-tipped Gulls Glaucous Gull Iceland Gull Ivory Gull Adult Adult Variable wing tip pattern Adult Immature Flatter (sometimes head Dusky face dark tips) Uniformly than Immature white Iceland (2nd winter) Gull

Longer & larger bill Immature Dark spots on st than Iceland Gull (1 winter) wing & tail tip Pale with brown wash Black bill in 1st winter and black tip in 2nd winter for both species Alcids - summer Common Murre Thick-billed Murre Razorbill Black Guillemot Atlantic Puffin Dovekie Large, colourful bill Long straight White gape Deep bill White patch Robin-

bill line visible in winter sized with and summer short bill

Alcids - winter

Common Murre Thick-billed Murre Razorbill Black Guillemot Atlantic Puffin Dovekie

White patch White behind Mottled black and white Dark face White behind eye extends above eye eye and chin

White throat