Hi Ray,

I am glad to see that this thread woke you up!

the practice has now become widespread not only for photographers but bird observers as well. the problem is not with education but the practice itself.

I disagree there.

Stress on a particular bird is not the problem. Alteration of the species behaviour is. There are now a number of examples of particularly secretive species where this technique has been over-used to the point where the species will no longer respond to its call.

Are you referring to locally rare or out of range birds and pairs of birds, or to populations of specific species in general? (I strongly suspect the former.)

Either way, please share an example or two with us and let us know where we can find the documentation.

There is as yet no evidence as to its effect on population numbers but then it will be difficult to collect the evidence!

We do agree on that.