Most mallard hens breed as yearlings, but they may not have much success; studies show that older hens have much lower duckling mortality than yearlings. Pair bonding starts as early as October and continues through March. Mallard males leave the hen soon after mating occurs. The hen usually lays 9 -13 eggs in a nest on the ground near a body of water. When the ducklings hatch after 26-28 days, the hen leads them to water and does not return to the nest.
Range eggs per season: 9 to 13.
Range time to hatching: 26 to 28 days.
Average eggs per season: 9.
Average age at sexual or reproductive maturity (male)
Sex: male: 365 days.
Average age at sexual or reproductive maturity (female)
Sex: female: 365 days.
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