I am strongly debating the right of this post to be placed under a 'Beauty of Cwm Goch' label.
We have been inundated with March flies (Family Tabanidae) this year - more than ever before.
Here is a picture.
You may notice the photo of the March fly and my knee is slightly blurry - that's because it is DARNED hard to keep still when these things are biting you - even through pants!
The females have a nasty bite and this year have swarmed on us in groups of up to 10 at a time the minute we step outside. The info on them says they are attracted to dark blue (which we haven't been wearing). They just seem attracted to any bare skin they can find. No amount of insect repellant or Eucalyptus oil, which we use around the decking to ward off the usual house flies, seems to work.
Cat suggested fly traps - we're looking into those. Any other suggestions gratefully accepted. We are wearing long sleeves and jeans in 40degree heat just to be able to venture outside.