Varroa don't eat wings, they suck haemolymph ("blood"). Deformed wing virus can be in the injected brew to keep the feed hole patent and can lead to shrivelled wings...not like these.
Older foragers can have pretty bashed up wings with bits missing but this does look more like it's maybe been caught and broken. Apart from getting snagged in a queen excluder can't think. Or someone's trying out queen clipping on your workers!
thanks for your replies. I confirm that:
- the wings are not deformed, but torn/ripped
- it is a forager bee, found a few meters from the hive
- I've never seen one such bee inside the hive
- I've seen several drones in the last month with such damage (always outside the hive)
- my varroa counts are really really low (0 mites in 7 days)
I was thinking about birds trying to catch them in flight or other predators, but I'd definitely exclude varroa damage for the above mentioned reasons.
With the bad weather perhaps your workers are getting rid of drone?? Workers can snag their wings on all sorts...or if they are drifting and trying to enter a strange hive they can be nibbled to persuade them to leave...