Southern Marsh Orchids

Southern Marsh Orchids

Monday, 28 July 2014


Several of this species of Weevil arrived in my moth trap recently and caught my eye because of its very distinctive elongate and curved rostrum.

Having done a bit of research, it is an Acorn Weevil, Curculio glandium.  The female uses the long rostrum to bore into the centre of an acorn to lay her egg. The larva feeds within the acorn and eventually bores its way out.  This species can be separated from the very similar looking C nucum (the Hazelnut Weevil) by the detail of the end 3 segments of the antennae.  For such an ungainly looking creature it is a very adept flier!

According to the NBN gateway it is relatively common in the southern half of Britain, but there are comparatively few Welsh records.  I'd hazard a guess it is under-recorded though!
Distribution of Curculio glandium in the UK according to records accessible through the NBN Gateway
C glandium distribution - NBN Gateway


  1. I used to trap in ancient oak woodland in Berkshire and caught quite a few of these, usually walking around on the rain guard on top of the trap. I've never caught one in Wales though.

  2. I wonder whether it had been blown in from somewhere perhaps? We don't have any oak trees as far as I know for a good quarter mile or so, and as I said it was a surprisingly nimble flier for something that looks quite comical on the ground!