230 
No attempt has yet been made to determine the effects of weather on production.’ 
It is expected, however, that some emphasis will be placed on a study of production- 
weather correlation if it appears to be warranted. 
Indexes of total population have not been computed either, but with the 
accumulation of more data this may be attempted in the future, 
Summary 
A waterfowl breeding ground survey of New Hampshire was made in the 
summer of 1950 for the second consecutive year. This is part of year-round waterfowl 
population study that succeeds the waterfowl habitat improvement survey as the major 
part of Federal Aid Project 7-R. As in 1949 emphasis was placed on locating duck 
broods in representative habitat in each of nine regional divisions of the State. Counts 
of full broods were made wherever possible. One man spent practically full time on 
the survey, and brood records were also obtained from other members of the Fish and 
Game Department as well as from outside cooperators. Altogether over one hundred 
different areas were covered, the majority having also been surveyed in 1949; and 273 
brood records were obtained. Wood duck and black duck broods again were found to 
occur commonly practically throughout the State, and in a wide variety of habitat. Of 
the two species the wood duck led in total number of broods both years. The third most 
common species both years was the hooded merganser, which like the American mer- 
ganser is fairly common in central New Hampshire and even more common farther north. 
The golden-eye has been found to be continuing as a common summer resident of the 
extreme northern part of the State. Least common of the regular summer residents is 
the ring-necked duck, which has been known to nest in New Hampshire only since 1947. 
In 1949 broods were found on four different ponds in the upper portion of the Connecticut 
watershed, and in 1950 broods were again found on these same ponds, and on one in the 
Androscoggin watershed. In 1950 also a mallard brood was found in the Merrimack 
watershed with no evidence that it belonged to released or escaped birds. 
