The chapters incorporated in the present Volume 5 of the book series Animal Diversity, Natural History and Conservation represents an extremely modest selection of several facts on the subject. The lead articles includes: - Community Ecology and Taxonomy of Polychaetes in a Tropical Estuary - Distribution of Nymphalid Butterflies (Lepidoptera: Nymphalidae) at Different Altitudinal Habitats - A Taxonomic Review of the Genus Cyrtolabulus Van der Vecht,...