Chicago Zoological Society, US

Sharks and their relatives, the rays and chimaeras, are the diverse group of cartilaginous fishes that have evolved over 400 million years. Historically considered of low economic value to large-scale fisheries, today many of these fishes have become the target of directed commercial and recreational fisheries around the world, and they are increasingly taken in the by-catch of fisheries targeting other species.

Despite their low species density, hyaenas are both unique and vital components of most African and some Asian ecosystems. Although there are only 4 species, they tend to clash with the interests of humans to a greater extent than many other mammals and one of the biggest obstacles facing those committed to the conservation of this species is the negative feelings that many people have towards hyaenas.

This reflects the ongoing activities of the Crocodile Specialist Group, providing the first application of the new 1994 IUCN Red List Categories to crocodilian status assessment.

Grebes are specisalised waterbirds which inhabit marshlands and reed-fringed lakes. Their dependence on wetlands is total and as a result they are particularly vulnerable to changes in ecosystems and their deterioration. So adapted are they to the wetlands they inhabit that they are an ideal indicator of the health of wetlands and the changes taking place, changes often imperceptible to humans. Since c.

Descended from a long and ancient lineage, tapirs are important tropical forest seed dispersers. However, today, all species of tapirs are threatened to various degrees by habitat destruction and hunting. This action plan was written with wildlife biologists, ecologists, administrators, educators and local conservation officials in mind and is aimed at those countries with tapir populations.

Over the last 30 years the African wild dog population has declined dramatically. Dogs have disappeared from 25 of the 39 countries in which they were previously found, and only 6 populations are believed to number more than 100 animals. Today it is believed that between 3,000 and 5,500 dogs remain in 600-1,000 packs only and most of these are to be found in eastern and southern Africa.

Dragonflies, those beautiful and colourful creatures which can often be seen hovering above water, pre-date dinosaurs. Today, some 5,000 species have been described and many more await discovery and description.

Found in a variety of forms and sometimes with very attractive flowers, cacti and other succulents have elicited widespread interest and tremendous popularity worldwide. Although the subject of a certain amount of debate, about 10,000 species of plant are recognised as belonging to the succulent group. Of these, an estimated 2,000 are threatened with global extinction in the wild and many more are regionally or nationally threatened.

The Ethiopian wolf is one of many species endemic to the highlands of Ethiopia but with only about 400 adults remaining, it is also the most endangered canid in the world. The main threats to this creature are loss of habitat to subsistence farming and livestock over-grazing, human development with all its subsidiary effects whereby human activity encroaches on the wolf's territory.