Show by subject Defensive habits Defensive habits in mammals, birds, reptiles and crustaceans. Old age Accumulation of body damages in animals throughout their lifespan. 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). Bromeliads Diversity of bromeliads (Brazil). Chicks, fledglings Invertebrates Diversity of forms in invertebrates. Recently added Periodic plumage changes in birds Individual variability