Wednesday, May 18, 2011
This picture of the hornet seen at home three days ago enabled me to asess its size. The window sill is 30mm deep; so I enlarged the photo until the sill measured that on the screen - and then measured the hornet.
It was about 32mm (one and a quarter inches) excluding antennae; and this is, if anything, under-estimating it. Apparently, the queens can get quite a bit bigger!