VIII TABLE OF CONTENTS. 



Family Laridae-^Conthiued. Fa ^_ 



Larus glaucescens 



Glaucous-winged gull j™ 



Habits , 65 



Distribution 73 



Larus kumlieni 73 



Kumlien's Gull 73 



Habits 73 



Distribution "" 



Larus nelson! ™ 



Nelson's Gull 76 



Habits-. ., 76 



Distribution-^ 76 



Larus marinus = 77 



Great black-backed gull 77 



Habits 77 



Distribution 85 



Larus schistisagus 86 



Slaty-backed gull 86 



Habits 86 



Distribution 89 



Larus occidentalis 89 



Western gull 89 



Habits 89 



Distribution 98 



Larus fuscus affinis . 99 



British lesser black-backed gull 99 



Habits 99 



Distribution 101 



Larus argentatus 102 



Herring gull 102 



Habits 102 



Distribution 119 



Larus thayeri 120 



Thayer's gull 120 



Habits 120 



Distribution 122 



Larus vegae 122 



Vega gull— 122 



Habits 122 



Distribution 124 



Larus californicus 124 



California gull 124 



Habits 124 



Distribution 131 



Larus delawarensis 132 



Ring-billed gull 132 



Habits 132 



Distribution jgg 



Larus brachyrhynchus 14 q 



Short-billed gull 140 



Habits 14 q 



Distribution 14 g 



Larus canus i46 



