Most of the chafer family of beetles are nocturnal and not often seen but occasionally you can be lucky and find one at rest during the day. I was fortunate to find this brown chafer (Serica brunnea) passing some time on a leaf in broad daylight in a deciduous woodland. It is a small beetle, oval in shape with very ribbed wing cases (elytra) which are brown in colour; hence the common name, the brown chafer. It is quite smooth lacking the hairs that some chafers have and it has a black head which helps distinguish it from the similar summer chafer.
The brown chafer flies as an adult from June until August but, as with many insects, much of its life is spent as a larvae. The chafers spend their formative years in the ground feeding on the roots of plants and, as a family, can be real agricultural pests and as such, are far less common than they once were as chemical warfare is waged against them. The brown chafer larvae, however, feed on the roots of grasses.
In common with other chafer species the brown chafer can be attracted by light so you might encounter one around your window or any outside lantern.