What it mean, when we have Owls on the VHF antenna?

I hope nothing bad, although owl has reputation of bad news herald. I hope nothing bad for us as well for OK2KKW during July VHF Contest. Some one week we always can listen to that bird sound. It sounds quite loud around our house and from trees in the park. Almost it is not possible to sleep with open window. And within last two days we have this noise overhead! On the OK1TEH antennas we have settled pair of young owls! Based on our pictures it would be Strix aluco, although his calling looks more similar to Asio otus. BTW on the morning is on the balcony below antennas nice squalidness...