It is noticeable, by intense flight, which lasts until night, even if, in nature, it is not picked;
Bees with pollen are few or absent;
When other colonies cease to fly, the predatory colonies continue to exploit the “source of harvest” until exhaustion;
Predatory colonies start the morning flight first;
Other colonies are often influenced by predators and adopt the same behavior.
Information obtained by consulting beekeepers from the Black Sea Basin Beekeepers Network as well as the paper Good practice guide for mountain beekeepers – Ministry of Agriculture and Rural Development / National Agency for Mountain Areas