2fT 
Table 3. —— Summary of Nest and Egg Data for all Nests under Observation, Gray's Lake, Idaho, 1949 and 1950 



NESTS EGGS 
Total Nests Nests | Percentage Total Eggs Eggs Percentage Average 
Species Terminated Successful Nest Success Terminated Hatched Egg Success Clutch 
1949 1950 
Canvasback 19 20 2 OR 68 60 1522 170 12 #27 66 42 8.0 82 
Redhead 24 49 16 4k 67 90 2% 457 120 ~ 318 59 70 8.9 9.3 
Ruddy duck 7) 5 7 2 58 40 90 34 49 9 54 26 8.2 668 
Scaup, Lesser 6 1 5 7 83 64 55 MC 54 89 57 9.2 85 
Mallard 20257 16 4 7 nn les 462 122 288 «#8=86973~—62 8.0 1 
Pintail | 24, 39 16 26 67 67 178 296 14 lal 64 61 767 16 
Teal, B-w./Cinn. 18 25 lo 13 56 52 U5 270 7% # 132 51 49 8.6 10.6 
Gadwall. a 4 1. 100 33 35 28 «2320—(«Oo 88 88 903 
_ Shoveler | - 4 = 3 Si 75 2s, 935 - 2 : 66 = 8.7. 
| All Ducks 128 86-213 87 149 68 70 1027 1846 661 1086 64 59 8.0 8.7 
- Goose, Canada 360 s«187 29 «140 82 75 166 968 124 612 15 63 4e3 heh 
Crane, Sandhill 12 44 ll 40 92 91 24 85 20 72 83 85 2.0 1.9 

