Hello fellow beekeepers. Hope everyone is safe.
I have two new flow hives with screened bottom boards and corflute slider. Both colonies are new and still establishing slowly. I'm in the Perth hills.
I'm noticing that on one of them, I have black debris. I tried to have a look with a magnifying glass but I couldn't identify anything in particular. I inspect these hives weekly or forthrightly and I haven't noticed any pest or disease that I can identify.
Any ideas from the photos supplied? (I was on the Flow forum but didn't like the egos so trying my luck here)
First two are from first hive, the other two from second hive