First very superficial inspection today, and one of my hives is gone. Looks like they left (no large amount of dead bees anywhere), and the only bees coming in/out seem to be simply robbing.
The comb looked odd, with 'debris' of flaky whitish flecks, a few dead bees head-out, and what looks like spider webs on some cells...
Pics below... just wanting to know: 1) what is that stuff? and 2) think I'd be safe to reuse that comb?