LAMELLIROSTRES. 341 



The migrations of these birds, as a whole, cover the 

 entire American continent from Greenland to the Argen- 

 tine country. Some species are truly Arctic; some 

 species are migratory from south to north; and two of 

 the tree ducks live chiefly within the tropics. The 

 last-named species are found from Texas and the Rio 



FIG. 114. Wood Duck (Galloway}. Photographed by Dr. J. W. Folsom. 



Grande country southward during the spring and summer. 

 They nest in trees; this is an unusual habit with the 

 birds of this order. The buffle-head builds its nest in 

 trees; the foxes are fond of the flesh on its plump little 

 body; hence the bird tries to protect itself by nesting in 

 stumps or trees. The widgeon or baldpate builds often 

 far from water on the grassy upland. The American 

 merganser, or fish duck, nests in some hole in a tree or in a 



