Size: 11-18mm
Basic colour: Blue-black
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Timarcha goettingensis

The largest British chrysomelid, known for exuding a drop of red fluid from the mouth when alarmed.

Size: 8-13mm
Basic colour: Shiny (at least slightly) - blue-black, violet-copper or black.
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Chrysolina violacea
, Confusion species: Timarcha tenebricosa

Size: 4.5-6.0mm
Basic colour: Black
Pattern colour: Orange-yellow apical spot covering one tenth to one third of the elytra
Number of spots: 1 main apical spot; sometimes a second very small spot slightly forward of this.
Spot fusions: Common
Pronotoum: Black
Leg colour: Black
Confusion species: Cryptocephalus bipunctatus

Size: 4-6mm
Basic colour: black and orange-red
Pattern colour: 1 black longitudinal band (variable, and may be split into 2 spots) on each orange-red elytron
Number of spots: 1 or 2 per elytron - if 1, usually as a band; if 2, usually one on 'shoulder' and one in the centre of the elytron.
Spot fusions: Sometimes
Other colour forms: Rare
Pronotoum: Black
Leg colour: Black
Confusion species: Cryptocephalus biguttatus

Size: 5.5-7.8mm
Basic colour: Metallic green or blue
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Cryptocephalus hypochaeridis