It is known that there are at least thirty species of invertebrates which are totally dependent on ragwort as a food source. There are many other species which require its nectar and pollen. As a common plant which is a good nectar source it is often a major and important resource for many declining species. Lost of habitat in general is a major problem for UK wildlife. Moth numbers have declined by over a third over the last 30 years and a major cause of this is habitat loss. This has knock on effects on other creatures such as bats and birds which use the insects as food. These pages below document some of the species affected and some of the science involved in the ecology of ragwort. There are many many more species than this list which is being added to as more material is researched.