The crows know.
Wrath Of Gnon
@wrathofgnon
In Japan there is now a minor boom in falconry: crows are attacking solar power plants with stones, and the only effective way to keep crows away is to deploy falcons. One trained falcon making 60 attack sorties a day can protect 100,000 solar panels from vengeful crows.
It is unknown why crows bombard solar panels, possibly it is a game. The stones seldom directly crack panels, but the crows are experts at placing stones or other garbage just so that they stay on top of the panel, soon causing overheating and destruction or permanent damage.
https://twitter.com/wrathofgnon/status/1502181648053399552