Keys to the adults waterbeetles – part 1

Key to the adult waterbeetles – part 2

British Scraptiidae

Determinatietabel voor Nederlandse Weekschildkevers

Marienkäfer

Die Buntkafer

Kafer im und am Wasser

Ground beetles

Ladybirds

Leaf Beetles

Guide to ladybirds (lieveheersbeestjes)

Guide to the ladybird larvae

Keys to the adults of Seed and leaf beetles of Britain and Ireland

Guide to Longhorn beetles

Micro ladybirds of Britain and Ireland

Guide to Distinctive terrestrial beetles of Britain and Ireland

Die Borkenkafer Deutschlands, Osterreichs und der Schweiz

The Histeridae, Sphaeritidae and Silphidae of Britain and Ireland