1 86 THE MIGRATIONS OF BIRDS 



vious in distant Utah. Another was reported, 

 through the State Department, by the American con- 

 sul at Acapulco, from a bird killed on the Papagayo 

 Lagoon in Guerrero. A third, banded July 3, 191 6, 

 was killed January 20, 1923, near Escuinapa, in 

 Sinaloa. 



To return to ducks, we find indicated a general 

 line of flight from the Salt Lake Valley to the west, 

 which is followed by a large number of birds, 

 among which may be enumerated green-winged 

 teal, shovellers, and a part of the pintails and mal- 

 lards. This flight strikes the broad valley of the 

 Sacramento, and then spreads southward through 

 the marshes and sloughs of the interior basin, south 

 to southern California. Return records from birds 

 banded near Great Salt Lake include a considerable 

 number of green-winged teal taken in the region 

 outlined in California. 



Another group of birds passes to the eastward, to 

 the Great Plains area, and continues south to Texas. 

 There is indication that some of the ducks that take 

 this route fly north through Idaho to the head- 

 waters of the Missouri, and then follow down east 

 of the foothills of the Rocky Mountains. At least, 

 I have record of one pintail banded and released at 

 the mouth of Bear River September 4, 191 6, which 

 was killed eleven days later near Glasgow, Montana, 

 and there are three returns of banded redheads from 



