Second Broods in Wood Ducks

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Abstract
Of 1626 nesting attempts by wood ducks (A. sponsa) in southeastern Missouri [USA], 35 were 2nd clutches that were laid in the same season after an initial nest was successful. Most 2nd nests were initiated between May 15th and 30th and were an average of 876 m away from 1st nests. Clutch sizes were different between 1st and 2nd clutches, but hatching success was not. Most females known to raise 2nd broods were 2 yr old or older. Females with 2nd nests weighed less at initiation of incubation and lost less weight per day than during the 1st nesting.

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