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Kleidocerys resedae Birch Catkin Bug
Family: Lygaeidae

Found throughout England, Wales and southern Ireland, this rust-coloured bug is common on or around birch trees. The  forewings are patterned and largely transparent, with the corium and clavus punctate. The clavus has three rows of punctures.

Adults overwinter, emerging and breeding in the early spring, when they fly and emit mating calls using a strigil found on one of the hind wing veins. Larvae occur March-September and there are several generations a year, at least in the south.

K. ericae is very similar, but slightly smaller and found on heathland where it is associated with heather. Further differences are given under this species.

Adult: All year
Length 4.5-5.5 mm

Kleidocerys resedae Birch Catkin Bug

Adult: Berks (June 2008) ©Jonathan Michaelson

Kleidocerys resedae Birch Catkin Bug Kleidocerys resedae Birch Catkin Bug
Adult: (September 2007) ©Brian Valentine Adult: (February 2008) ©Brian Kilford

Kleidocerys resedae Birch Catkin Bug Kleidocerys resedae Birch Catkin Bug
Adult: west London (April 2008) ©Julian Oliver
Adult: (October 2007) ©Brian Kilford

Kleidocerys resedae Birch Catkin Bug Kleidocerys resedae nymph
Nymph: Leics (August 2008) ©David Gould Nymph: north London (September 2008) ©Tristan Bantock