21 
last seen. August 27 - brood still here and ready to fly (last visit). Travel - 
0.08 miles in hl days. 
2. A Class I brood of five. July 1) - at pothole No. 37. July 22 - one 
young remaining. (This is undoubtedly the same brood since the others in this 
area were known at this time.) July 28 - at pothole No. 35. August 18 - hen 
last seen. August 27 = one Class III young still here (last visit). Travel - 
0.0) miles in ) days. 
3 A Class I brood of nine. July 23 - at pothole No. 20. August 2 - at 
pothole No. 21. August  ~ last noted (became confused with another brood). 
Travel - 0.07 miles in 12 days. 
These four broods, observed for a total of 117 days, traveled overland 
only 0.19 miles for an average of 0,001 miles a day. No broods of this species 
were seen to fly, but three out of eight broods on the area were know not to 
have moved at the termination of the study, when they were nearly ready to fly. 
Pintail -- The eggs in a pintail nest midway between potholes Nos. ) and 5 
were colored red with Ponceau SX on July 3 and hatched about July 7. This brood 
was seen only once, on July 23, when four brilliantly colored young were found 
on pothole No, 20. This was judged a poor count as they were driven from the 
emergent cover and some may have been missed, This pothole was beaten out four 
times between July 23 and 29. Twice, a pintail hen was seen feigning injury, 
and on the other two visits a brood was heard peeping and rustling in the cover, 
but the young were never seen, Further visits in the vicinity failed to reveal 
any sign of the brood. 
This brood traveled 0.42 miles from the nest in 16 days. 
Additional information is furnished by two unmarked broods as follows: 
1. <A Class II brood of nine. June 13 - at pothole No. 33. June 13 - 
June 29 - location unknown. June 29 = July 11 = back at pothole No. 33. July 
1h = at pothole No. 35 (last seen). Travel - 0.12 miles in 31 days. 
2e A Class II brood of four. June 17 - at pothole No. 37. June 21 = at 
Type Bl pothole northwest of No. 37. June 29 - at pothole No. 32. July 5 - 
at pothole No. 33. July 11 ~- last sem. Travel - 0.2) miles in 2) days, 
These three broods were observed to travel 0,78 miles in 71 days for an 
average of 0,011 miles a day. No brood of this species was known to occupy a 
single pothole for more than 1) days. 
Mallard — A mallard nest with nine eggs southwest of pothole No. 11 was 
marked with Fast Green FCF and hatched about June 27. A complete "beatout" of 
all potholes within a quarter of a mile of the nest failed to reveal the brood. 
On crossing the prairie 75 yards east of the nest, one of the young, about 1 
day old, was found dead in the midst of a colony of thirteen-lined ground 
squirrels (Citellus tridecemlineatus), The other ducklings of the brood were 
never located. 
Some additional information is provided by the following cases: 
1. A Class II brood of four. June 28 = at pothole No. 17. July 16 - at 
pothole No. 21 (last seen). Travel - 0.16 miles in 16 days. 
2. A Class II brood of 11. July 9 = at pothole No. 22. July 10 - at 
pothole No. 21. July 15 = one young flew. July 23 - at pothole No. 2h. 
