Hi Stefanie.
Yes, its an interesting subject, – and having a thread now means that we can now from time to time post any observations regarding this.
And most certainly welcome anyone who wants to contribute to this at whatever time.
I think its a difficult subject though to investigate 🙂 .. I dont know how one could find out with these small fry 🙂 ..
This wont stop me from trying to catch them on camera as small as possible and will keep posting photos ..