Hoverflies are one of my favourite groups of insects – many of them are easily identified by their colouration.
If you want to learn more about hoverflies there are two excellent books – the top one is British Hoverflies by Alan Stubbs and Steven Falk – it has excellent plates and keys to all the species. With a bit of practice it is not difficult to identify species. The lower book is Britain’s hoverflies by Stuart Ball and Roger Morris – published more recently – it is cheaper and relies on photographs of the species. Steven Falk also has an amazing Flickr site where has has photographed hundreds of species – here is the link to his hoverfly sections – again this is really helpful when trying to identify species.
There is also a national scheme where you can lodge your hoverfly records – see here Hoverfly Recording Scheme – give this group a go – it will give you endless hours of fun,