Should we care?

Apparently the cuckoo is becoming a rarer sight or sound in these islands. Various reasons have been put forward for this - global warming (obviously!) and pesticides and other changes in farming practices heading the list. This may be a matter of concern to the RSPB and bird watchers generally, but should the rest of us be concerned? It is not, after all, a native bird - it migrates here from Africa for the summer and then returns, and as is well known, it has some rather nasty social habits. If you could ask the opinion of other birds, I imagine their reaction would be "good riddance!"