. The Canadian field-naturalist. 1974 Bouvier: Hooded Merganser Breeding in Quebec 325 «.T7; 'v. i' Figure 2. Nest box made of galvanized stovepipe and fixed on a metal post. first arrivals in spring and the thawing of the Rouge River. The ducks seen before the spring break-up were usually on small patches of open water where creeks flowed into the lake, or were observed in flight. Nest Boxes Available and Used More than 15 nest boxes were put up by Cana- dian International Paper personnel during the 1966 winter and were available to ducks in the spring of 1967. Thorough investigation of all b
. The Canadian field-naturalist. 1974 Bouvier: Hooded Merganser Breeding in Quebec 325 «.T7; 'v. i' Figure 2. Nest box made of galvanized stovepipe and fixed on a metal post. first arrivals in spring and the thawing of the Rouge River. The ducks seen before the spring break-up were usually on small patches of open water where creeks flowed into the lake, or were observed in flight. Nest Boxes Available and Used More than 15 nest boxes were put up by Cana- dian International Paper personnel during the 1966 winter and were available to ducks in the spring of 1967. Thorough investigation of all boxes was not done until the spring of 1970. The ducks used 8 out of 15 boxes in 1970, 11 out of 18 in 1971, and 8 out of 13 in 1972 (Table 2). A box was considered not available if it had been taken down, had been blown down by wind, or had no roof. Clutches Out of 27 clutches in 1970-1972, 11 Hooded Merganser clutches contained from 5 to 18 eggs, three Common Goldeneye clutches contained seven to nine eggs, and one Wood Duck clutch contained 10 eggs (Table 3). Godfrey (1966) re- ports that Hooded Mergansers lay 5 to 12 eggs, Common Goldeneyes 6 to 15 eggs, and Wood Ducks 5 to 15 eggs. I encountered no less than 10 clutches contain- ing eggs of more than one species (Table 3). In- stances of females of all three species incubating joint clutches were recorded. Hooded Mergansers incubated from one to four goldeneye eggs in six nests; Common Goldeneyes incubated one and four merganser eggs, respectively, in two nests; in Table 1 —Relationship of thawing of Rouge River and arrival of Hooded Mergansers, Common Goldeneyes, and Wood Ducks in spring 1969-1971 Year Date of thawing of Rouge River Hooded Merganser Arrival of first ducks Common Goldeneye Wood Duck 1969 1970 1971 April 13 April 18 AprU 22 April 14 AprU 18 AprU 23 AprU 9 AprU 11 April 15 April 18 AprU 10. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readab
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