Again, this is not just the case for Glossy BCs but for many species of our native birds for whom caring people have put up nest boxes given the growing destruction of older trees with natural hollows. Many of our bird and mammal species need hollows for shelter and reproduction. These hollows take upwards of one hundred years to form so there has been an increase of nest boxes being put up by individuals and organisations alike to ensure these species have a place in which to raise young. The problem is, however, that with global warming if nest boxes are not positioned correctly or constructed adequately eggs and chicks can overheat and die so we have to be very careful. We must not stop putting up nest boxes, just make sure that we do it properly wherever we are. Thank you for putting this topic up. I'll see if I can find another that provides more detail.