Cetonia aurata

Cetonia aurata
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Family:	Scarabaeidae
Subfamily:	Cetoniinae
Genus:	Cetonia
Species:	C. aurata
Binomial name
Cetonia aurata (Linnaeus, 1758)

Cetonia aurata, called the rose chafer or the green rose chafer, is a beetle, 20 mm (¾ in) long, that has a metallic structurally coloured green and a distinct V-shaped scutellum. The scutellum is the small V-shaped area between the wing cases; it may show several small, irregular, white lines and marks. The underside of the beetle has a coppery colour, and its upper side is sometimes bronze, copper, violet, blue/black, or grey.

Cetonia aurata should not be confused with the North American rose chafer, Macrodactylus subspinosus, or with the rarely seen noble chafer, Gnorimus nobilis, which is very similar to the rose chafer. One way to identify Cetonia aurata is to look at its scutellum; on the noble chafer the scutellum is an equilateral triangle, but on the rose chafer it is an isosceles triangle.

Overview

Rose chafers are capable of fast flight; they fly with their wing cases down. They feed on pollen, nectar, and flowers, especially roses. They can be found among roses on warm sunny days from May until June or July, and occasionally as late as September. Rose chafers are found in southern and central Europe and in the southern part of the United Kingdom, where they sometimes seem to be very localized. They are a beneficial saprophagous species (detritivores).

Life cycle

The larvae are C–shaped and have a firm, wrinkled, hairy body, a small head, and tiny legs. The larvae overwinter wherever they have been feeding, which may be in compost, manure, leaf mould, or rotting wood. They grow very quickly and will have moulted twice before the end of autumn. They have a two-year life cycle. They pupate in June or July. Some adult beetles may emerge in autumn, but the main emergence is in spring, when the beetles mate. After mating, the female beetles lay their eggs in decaying organic matter and then die.

Coloration

The metallic green coloration of the beetle is created structurally, caused by the reflection of mostly circularly polarised light; like other scarabs this is left circularly polarised. When viewed through a right circular polariser, the beetle appears to be colorless.

Gallery

• Scara fg03.jpg

  Larva

• 

  Pupa

• Cetonia aurata (Linnaeus 1761).jpg

  Adult

• Cétoine dorée vol.jpg

  With outspread wings; note the closed elytra

• Cetonia aurata take off composition 05172009.jpg

  Flight pattern

• Cetonia aurata 10.jpg

  Cetonia aurata

• Cetonia aurata MF.jpg

  Color variations

See also

• Scarab (a disambiguation page)
• Scarab (artifact)

External links

• La Cétoine Dorée (Cetonia aurata) (Coléoptère Cetoniidae)
• Photos of Cetonia aurata
• Photos of Rose chafer - Cetonia aurata and other flower beetles.
• Rose chafer Cetonia aurata, some life cycle photos.
• Color of Cetonia aurata through 3D movie glasses, a 24 sec YouTube video demonstrating the handedness of the shiny color of the beetle.