Window collisions

["michael norris" <>]

Hi Dave

I remember an item (in Wingspan?) giving alarmingly high casualty rates for 
Swift Parrots in Hobart as a result of collisions with windows and high 
fences (eg around tennis courts).
But I take your main point.  And I would like to nominate excessive lighting 
as another threatening process, especially for its effects on nocturnal 
insects with consequent effects on ecosystems and therefore birds.
Michael Norris