Bird population indices are available from Europe and North America. More accurate and comparable time-series data on wildlife populations still need to be developed. Many natural ecosystems have been degraded, limiting the ecosystem services they provide. The targets agreed in 2002 by parties to the CBD to “significantly reduce the rate of biodiversity loss” by 2010 were not met, at least not at global level. Scientific consensus projects a continuing loss of habitats and high rates of extinction throughout the century if current trends persist. Many species are threatened by habitat alteration or loss, both within and outside protected areas (e.g. on farms and in forests).