Originally posted by CrimsonMoon
Oh sorry I apologise, it has nothing whatsoever to do with spring, instead I can see clearly now that as you have already implied, its down to earthquakes...
excuse me while I go bang my head against a concrete wall.edit on 13-9-2012 by CrimsonMoon because: (no reason given)
Rather than simply not calling out for mates (which was what was implied earlier), they could merely be absent because they migrated.
They could also be dying due to a local disease or something.
Or it could all be a mere coincidence and actually nothing is really that different.
Anything is possible but at this time we cannot determine which is more likely since we don't know any facts about how many birds are in what location etc.
No need to bang your head against the wall.