I had a strong hive in a neighbor's yard and 3 weeks ago it seemed to be doing fine. Yesterday I found a dead hive with lots of bees (and a few yellowjackets) laying on the screened bottom board. There were some lively bees in the top box I used for feeding and I assume they were robbing the feed. There was a small amount of capped honey and no bee butts sticking out of comb.
Two weeks ago this neighbor had a large tree taken down and the logs were dumped in the swamp within 5 feet of the hive. My suspicion is that the tree cutting guys were bothered by the bees (perhaps stung) and sprayed bee/wasp killer into the hive entrance.
Does anyone have a suggestion for how I might test my suspicion, other than simply asking (which I intend to do after I speak with the neighbor)? Thanks.