more them four years old was reooverod it is probable in most birds that 
ohanced to survive beyond a period of three years the bands had v/orn until 
fa * vjv^ 
is Had broken and «*» lost, *o be used successfully therefore, snob bands 
A * 
should bo made of material of teles the thickness used for ordinary poultry 
bands, The wear on the metal is due not so much to aotual friction ia rad 
as to a form of electrolysis induced where birds frequent alhaline or 
saline waters. Wear from this scarce would be expeoted in the Grout Basin 
region and in the West in gsneraljand might be a negligible factor in ducks 
that frequented fresh waters ia the eastern States. 
J&offi the total Of 1241 
Wt 
bed birds that have been released 180 
returns have been received, or somewhat mare than 14 per cent. Of the 
whole number of birds mar iced 094 were duoks of which 174 were repeated. 
The number of returns from birds of this group, a little more than 17 
• *• v‘ . 
per cent, Indicates me results that may be obtained from work in banding 
birds of this family. 
Bie returns from all of the records cover a vast area extending 
from western Missouri and Kansas west to California, and from Mexico to 
/ Qit 4ca-1) 
Saskatchewan. A study of these results indicates one lias of flight to 
A 
the westward from the Salt Laics Valley to California, a route follovred by 
the green-winged teal and shovellers, and part of the mallards and pintails 
Another lot of birds that includes cinnamon teal, redheads, pintails, and 
mallards crosses to the great glains region and travels south into Texas. 
> 
Indications are that some of these fly north and east to cross the divide 
separating Snake River from the head waters of the Missouri to follow down 
east of the foothills of the Rocky Mountains, ©rnt all follow this route 
