This is a misconception; erect-crested penguins, along with other penguin species, generally lay two eggs during the breeding season. The first one usually acts as a "test" egg, which serves to strengthen the pair bond between the breeding parents. Both of the eggs receive incubation efforts from the males, and the chicks are cared for by the parents. However, some penguin species may display variation in their egg-laying behavior and parental care.