Butterflies of Warwickshire, Coventry and Solihull
Purple Emperor
Apatura iris


Probably the most magnificent butterfly to be seen in Britain, the Purple Emperor is an enigmatic butterfly and is the second largest in Britain.

The deep purple colouration of the male Purple Emperor is a result of light refraction by ridges on the wing scales. It is only visible from certain angles depending upon the direction of light. The females lack this colouration being primarily dark grey-brown but with larger eye spots towards the rear of the hind wings. Both sexes have a broken flash of white across the forewings. The underside has a large eyespot used to deter predators.

It flies high in the tree-tops where it feeds on aphid honeydew and sap runs. They never visit flowers to feed but are often seen feeding on the ground on animal faeces, carrion or salts left as puddles evaporate.

The males are known to travel more than 1000 metres from their breeding areas, gathering in what are known as master trees where the males compete for females which are seen less often.

Larval Food plants
Goat Willow (Salix caprea)
Grey Willow (Salix cinerea)
Crack Willow (Salix fragilis)

Habitat Requirements
The Purple Emperor occurs in expansive broad-leaved woodland or in areas where there are clusters of smaller wooded areas where the larval foodplant is abundant.

Warwickshire Status
Resident

Where to see the Purple Emperor
Ryton Wood (WWT Reserve)
Other Species
Please select an alternative species from the list below.

Purple Emperor
© Steven Cheshire - Northamptonshire
First Sightings
First sighting dates are based on records of Purple Emperor submitted online. Please note that these dates are not updated retrospectively to include records submitted to the branch recorder in other forms.

29/06/2010 - Oversley Wood
24/06/2009 - Oversley Wood
04/07/2008 - Bull & Butcher Wood and Princethorpe Great Wood
29/06/2007 - Ryton Wood
Purple Emperor Purple Emperor
© Steven Cheshire - Northamptonshire   © Keith Warmington - Ryton Wood, Warwickshire
Adult Flight Times
The flight chart below is based on observations of the adult Purple Emperor in Warwickshire between 2005 and 2008. Peak periods are shown in dark green.
Purple Emperor Flight Chart
Warwickshire Distribution Maps base on Vice County (CV38) which includes Coventry and Solihull
Distribution of the Purple Emperor during the indicated period.

Key to Warwickshire Maps: sightings 12-910+
Purple Emperor - 2007 records / distribution.   Purple Emperor - 2008 records / distribution.   Purple Emperor - 2009 records / distribution.   Purple Emperor - 2000 to 2009 records / distribution.
2007 Distribution Data (1yr)   2008 available soon   2009 Distribution Data (1yr)   2000-09 Distribution Data (10yr)