Complex life cycles dominate among insects (estimated to be more than 80% of the species) and other invertebrates. Clearly, that plan for living is highly successful.

More than six years in the making, the book weaves statistical analysis, opinion research and old-fashioned reportage to draw a new picture of the adult life cycle. The traditional life cycle ...

Another insect often noted as having one of the shortest life cycles is the common fruit fly, which also is known as the vinegar fly. From egg through larva and pupa to adult, the fly lives about ...

Slide 1 of 4, A peacock butterflies eggs on a leaf., Eggs A European peacock butterfly's life cycle begins when an adult female butterfly lays eggs underneath a leaf. End of image gallery.