One of those animals who are known to be in decline is the British Hedgehog. They are one of the species which have suffered the worst, with them dropping from 50 million animals in the 1950s, to just uner 1 million Hedgehogs which are left today in the British countryside. This shows how much in decline wildlife in Britian is.
Another two things which is causing a loss of biodiverity is climate change. Therefore; climate change, habitat erosion, and a decline in wild animals, are all causing biodiverity to decline.
As stated, Hedgehogs are one of the most serious cases of decline in the British countryside, but, sadly, they are not alone. Along with Hedgehogs birds and insects are declining. And, to go along with that, we do not have a sufficent amount of predator species left, in mammals. The only semi-large mamall predators that we have left are Foxes, and the Scottish Wildcat, however, the Scottish wildcat is critically endangered, and their future is uncertain. Therefore, quite possible the only mammal predator that we shall have left (which is quite large) is the Fox.
This study was carried out by the University of Reading, and has been carried out since 1970, up until 2009. Therefore, the study has a better understanding of how wildlife has changed over the past few decades, and also how wildlife and biodiveristy have suffered and declined, because of a loss of habitats.