Paul Hobson / Two Puffins (Fratercula arctica) fighting, Saltees Islands, Republic of Ireland, July

Steve Knell / Pair of Puffins (Fratercula arctica) in courtship ritual on grassy clifftop. Iceland, June

Steve Knell / Puffin (Fratercula arctica) standing on cliff, collecting nesting material, Iceland. June

Flip de Nooyer / Atlantic Puffin (Fratercula arctica) three perching on coastal rock, Europe

Flip de Nooyer / Atlantic Puffin (Fratercula arctica) with feathers in beak to be used as nesting material during breeding season, Europe

Flip de Nooyer / Atlantic Puffin (Fratercula arctica) landing in group on rock during breeding season, Europe

Flip de Nooyer / Atlantic Puffin (Fratercula arctica) group on rock, Europe

Flip de Nooyer / Atlantic Puffin (Fratercula arctica) portrait of adult during breeding season showing colorful bill and rictal rosette in corner of mouth, Europe

Flip de Nooyer / Atlantic Puffin (Fratercula arctica) portrait of adult during breeding season showing colorful bill and rictal rosette in corner of mouth, Europe

Flip de Nooyer / Atlantic Puffin (Fratercula arctica) portrait of adult calling during breeding season showing colorful bill and rictal rosette in corner of mouth, Europe

Flip de Nooyer / Atlantic Puffin (Fratercula arctica) close up of eye, Europe