Bill Bouton:
Black-legged Kittiwake, Rissa tridactyla
Bill Bouton:
Black-legged Kittiwake, Rissa tridactyla
Bill Bouton:
Black-legged Kittiwake, Rissa tridactyla, adult basic plumage
Bill Bouton:
Black-legged Kittiwake, Rissa tridactyla, first winter
Bill Bouton:
Black-legged Kittiwake, Rissa tridactyla
Bill Bouton:
Black-legged Kittiwake, Rissa tridactyla
Bill Bouton:
Black-legged Kittiwake, Rissa tridactyla
Bill Bouton:
Ivory Gull, Pagophila eburnea
Bill Bouton:
Ivory Gull, Pagophila eburnea
Bill Bouton:
Ivory Gull, Pagophila eburnea
Bill Bouton:
Sabine's Gull, Xema sabini
Bill Bouton:
Sabine's Gull, Xema sabini
Bill Bouton:
Sabine's Gull, Xema sabini
Bill Bouton:
Sabine's Gull, Xema sabini
Bill Bouton:
Sabine's Gull, Xema sabini
Bill Bouton:
Sabine's Gull, Xema sabini
Bill Bouton:
Sabine's Gull, Xema sabini
Bill Bouton:
Sabine's Gull, Xema sabini
Bill Bouton:
Sabine's Gull, Xema sabini
Bill Bouton:
Sabine's Gull, Xema sabini
Bill Bouton:
Little Gull, Hydrocoloeus minutus or Larus minutus
Bill Bouton:
Bonaparte's Gull, Chroicocephalus philadelphia
Bill Bouton:
Bonaparte's Gull, Chroicocephalus philadelphia
Bill Bouton:
Bonaparte's Gull, Chroicocephalus philadelphia
Bill Bouton:
Bonaparte's Gull, Chroicocephalus philadelphia
Bill Bouton:
Bonaparte's Gull, Chroicocephalus philadelphia
Bill Bouton:
Bonaparte's Gull, Chroicocephalus philadelphia
Bill Bouton:
Bonaparte's Gull, Chroicocephalus philadelphia, 1st winter
Bill Bouton:
Bonaparte's Gull, Chroicocephalus philadelphia, 1st winter
Bill Bouton:
Laughing Gull, Leucophaeus atricilla
