Birds

Vol. 1 (Northern hemisphere)

Vol. 2 (South America)

Vol.3 (Central and South America)

Vol.4 (South and South East Asia)

Vol.5 (Indonesia, Malaysia, Philippines)

Vol.6 (Africa)

Vol.7 (Australia, Papua New Guinea)

Vol.8 (Madagascar and Indian Ocean islands; New Zealand and Pacific Ocean islands)

Vol.9 (extinct animals and index)

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.

The practice of keeping live birds in captivity has been widespread throughout this century and has increased considerably as the 20th century comes to a close. In the last decade or so, the increased trade in live birds from Tanzania has given rise to a number of concerns regarding the sustainability of the trade, its effects on bird numbers, and illegal trafficking.