Table 31.—-Monthly Distribution of Hunters! Reports of Redheads 
Raised in Utah 
Banded in Utah 1926-33. About 12 per cent of these recovery dates 
represent approximations made by banding clerks at the time reports 
were received in Washington. 
ere sua onths in Which Birds Were Repor Sho 
Reported Hunting Shot 2s Juveniles Shot as Adults 
Shot Season Sept. Oct. tov. ec. can. Total ‘Sept. Oct tiv lec. an. Total 






Alta. IX/15-XII/IL - - - = = os Ee the fet “eens 2 
Sask. IX/15-XII/31 -- 1 - = «= 1 a ere Ps ue Wee 1 
Mont. IX/16-XII/31 5 4 - = = 9 a 1 
N. De " " 1 1 - — = 2 = 2 = = = 2 
Minn " " 12.s«s= -« 3 ‘ar 3 
Mich. " " es ee 1 - = le - 1 
Wyo. " * 18 16 1. -~ 35 5 ele le ek es 3 
S. D. " " 3 = =e = = 3 2 lala ee 3 
Neb. " " Sasa pet, ee 6 YF edie Ee 6. 
Cole. " " 20 26 1- -« 47 it, 7" ee ae! ee 9 
Kan, " it ad ae ee 2 = ee eee ee 1 
Nev. n tt 8 8 21 - 19 2 38s Fee 6 
Wash. X71-1/15 - - = ~ - ~ 1 - - T 
Idaho " 1" 12 2-2 «= 16 2 = = -« 2 
Ore. toon ar FT ek. ere 2 es 1 
Utah non 153 11 2 -—- 166 3 = 2 -« 5 
Calif. " oN 17 8 S & 3h, 5 8 5 2 19 
PiZe 3 - - : 3 - - - 5 
NeM. "™ ® 5 le i 7 ly me nS oe hy 
Okla. " " Lue ae ee 3 252 ewe a 
Tex. Hoon 5 22 6 5 38 3 5 - «= 8: 
La. - -_ -- - So) oe aie k wir ahs ce 
Md. - - = «= ~ ee: 1 
Mexico 2 21 1 6 - ll =— « 1 
Total 62 257 5818 12 406 9 hk 22 12 1 88 
Per cent 15 63 ly hk 3 99 1C 51 25 ly 1 101 

Composite life tables 
| Mortality statistics on this species are complicated by the ex- 
treme vulnerability of new-flying late-hatched young to shooting 
(Hochbaum 194, p. 142). The extraordinary age ratio of 1 adult to 
23 juveniles found in hunters! bags at Delta, Manitoba, by Hochbaum 
(194, p. 133) is exceeded by the ratio of 1 adult to 33 juveniles 
for the banded birds shot in Utah (table 31). These two sources of 
data are not, of course, exactly comparable. Cecil S. Williams, who has 
had abundant field experience on the Bear River Migratory Bird Refuge, 
emphasizes in a letter (May 12, 1947) that differential sex migrations 
occur also in Utah, that adult female redheads tend to desert their 
7h 
