Unfortunately photographers like to post pictures, where the helicopter is momentarily a little bit lower than planed - problem with training - and with serial shots of cameras....
Doing this kind of training for a decade, hadnīt had problems so far and a technican is checking every bird afterwards.
More concern is to the electronic departement - but even there - no water.
Procedure is beeing finetuned from year to year to reduce risks involved - and due to this training a couple of people were rescued and are still alive!