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They construct nests of bulrush and lay one to three eggs, (usually two) in late April and early May. The incubation period is about 29 to 31 days. Whooping cranes will renest if the first clutch is lost or destroyed before mid-incubation.Both sexes share incubation and brood-rearing duties. Despite the fact that most pairs lay two eggs, seldom does more than one chick reach fledging.he life span is estimated to be 22 to 24 years in the wild. Whooping cranes are omnivorous feeders. They feed on insects, frogs, rodents, small birds, minnows, and berries in the summer. In the winter, they focus on predominantly animal foods, especially blue crabs and clams.
Prepared 2010; updated 2011. The number of young hatched and successfully raised by whooping crane pairs in the reintroduced population is below expectation with most pairs abandoning first nests after egg laying.everal pairs have nested in the same areas for 22 consecutive years. Wild whooping cranes may start laying eggs as early as three years of age although the average age of first egg production is usually five years old.