Show by subject Periodic plumage changes in birds Others Diversity of forms in slime molds and brown algae. Defensive habits Defensive habits in mammals, birds, reptiles and crustaceans. Plants Diversity of forms in plants. Adult Orthopterans and True bugs and their nymphs Insects from the orders Orthoptera and Hemiptera undergo incomplete metamorphosis, with a larva (nymph) similar to the imago. In this collection, the nymph is shown first, followed by the adult. Sexual dimorphism II Examples of differences in the appearance of males and females of the same species of arthropods, birds and mammals (compare on successive photos). Recently added Adult butterflies/moths (Lepidoptera) and their caterpillars Adult Orthopterans and True bugs and their nymphs