The United Nations declared 2010 to be the .http://www.worldmigratorybirdday.org/
This is an appreciation of the value of biodiversity for our lives. However, it is not only a celebration, but also an invitation to take action to safeguard the variety of life on earth. Our planet’s biological diversity is very rich and amazing. It is the result of billions of years of evolution and forms the complex web of life of which we are part and upon which we totally depend. Humankind relies on this diversity, because it provides us with food, fuel, medicine and other essentials which we need every day.
Regardless of that, species are disappearing because of human activities and there are a lot of species that are in danger of becoming extinct. The current rate of extinction is a thousand times faster than the natural one. Normally, only one bird per century becomes extinct, but during the last thirty years 21 bird species disappeared. At the moment 192 birds are classified as Critically Endangered as a result of habitat loss, hunting, pollution, climate change, human disturbance and other reasons. These threats are directly or indirectly man-made. Without immediate action, many of these endangered species will not be here in a few years time. Puffinus mauretanicus, for example, is expected to become extinct within a human generation due to fisheries by-catch. And there are several other species which are extremely rare. The population size of Numenius tenuirostris, Oceanites maorianus as well as Cyornis ruckii is under 50 individuals.
Therefore in 2010, the , World Migratory Bird Day focuses on Globally Threatened Migratory Birds and especially on those , which are classified as Critically Endangered in the IUCN Red List. These are birds, which face extinction. Migratory birds rely on several different habitats; they need different locations for breeding and raising their young, and for feeding. Some of them migrate up to thousands of kilometers to find suitable areas and cross many different habitats, regardless of any political borders. Because birds are found nearly everywhere and, they serve as vital indicators of distribution and state of biodiversity and the ecosystems they inhabit. If a bird species becomes threatened by extinction it is a clear sign that the conditions of, or the ecosystem itself, have changed and that other species that depend on this ecosystem may be affected as well.