COLLECTING. 2$ 



found in similar localities in winter, but migrates 

 northward during the summer, breeding in the 

 interior, from Utah to the Arctic regions. 



Graculid^e : Cormorants. — Occur on sand- 

 bars in the south, or on rocky cliffs in the north, 

 and on the Pacific coast. During migrations they 

 keep well out to sea. They have the habit, in 

 common with the gannets and pelicans, of alight- 

 ing on barren sand-spits which rise out of the 

 water. 



Plotid^e : Darters. — The snake-bird of the 

 south occurs on bodies of fresh water, and may be 

 seen perched on trees or flying high in air. They 

 are exceedingly difficult to kill, being, as a rule, 

 shy, and very tenacious of life. 



Tachypetid^e : Frigate Birds. — The frigate 

 bird is found with us only on the Gulf of Mexico 

 and among the Florida Keys. They are usually 

 seen upon wing, but I have observed thousands 

 perched on the mangroves on the Keys. They 

 roost on the trees on lonely islets at night, at 

 which time they appear so stupid that they may 

 be approached quite readily. 



Piletontid^e : Tropic Birds. — These fine 

 birds occur only in tropical waters unless they 

 are accidentally blown out of their latitude by 



