Flycatchers prey

It won't be long that the young flycatchers go on the wing.
Every day I expect the young peeking out of the hole of the nestbox.
But until now only the father and mother fly off and on to the nestbox.
I am always curious what the prey will be for lunch and breakfast.
though it is not always easy to get a glimpse of it
Today it seems to be kind of wigly insect and beetle.