Process:  -A bird lays eggs in a nest -The parent(s) incubate the eggs -The eggs hatch -The mother (and sometimes the father) bird take care of the baby birds -The baby birds grow up and get their flight feathers -The young birds learn to fly and leave the nest -The adult birds find mates and mate.
 Question: What is the effect of Females will lay more infertile eggs on less birds.?
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