Beturns from all the records cover a vast area. extending 
from west era Missouri sad Kansas west to California, and from 
southern Mexico (Guerrero) to Saskatchewan 
study 
of the results Indicates one general line of flight to the west 
from the Salt lake Valley to. California, a route followed hy 
green-winged, teals and sho-rollers and part of the mallards and 
pintails, Another line of flight* taken hy a group of birds 
that includes cinnamon teals, redheads, pintails, and mHards, 
* 
crosses to the Great Plains region and travels south into Texas. 
Indications are that some of those last mentioned fly north and 
east to cross the divide separating Snake Kiror from the headwaters 
of the Missouri M ,follow down east of the foothills of the hooky 
Mountains; that all feHw ,such a route is doubtful, since there 
&o tiling 
across any of the mountain 
passes. There Is also a third general migration southward over the 
Bocky Mountain Plateau, probably by a comparatively sraall number of 
birds, that carries the snowy herons and some of the ducks through 
<uJh4 cm/4 
the scattered lakes and ponds found in Utah, to Mexico, and Arizona, 
A 
