When it first happened, my thought was a shortage of tiercels as well. However having seen Jack personally escort several tiercels out of the territory the past 2 years...I have to wonder if not's the 'territory' thing. You know, the bigger the better...perhaps like some other male species...

Dumpster Kitty: Something actually came to me last night since you mentioned Windwhistler ..actually at about 2 am in the morning after I saw some of your chat on the live cam about them all being Canadian.
Windwhistler: Born here at Etobicoke (Jack's current site) to Alberta - who although she was hatched in Alberta was fostered at the Hamilton nest and grew up there.
Jack: Born in Missauga..to Sal who coincidently was born at the Hamilton nest site to Madame X and a previous mate.
Archer: Born in Port Colbourn - 12 miles from the Hamilton nest site.
Why does that bother me? Maybe because Hamilton is/was a steel town, lots of industrial history 12 miles isn't far and easily if parents/offspring hunted in those areas, could they have been exposed to something that has affected their behaviour? Chemicals perhaps in the environment/water?
What are the odds that three tiercels - are exhibiting rare behaviour and they all have a small radius in common in their backgrounds? Maybe I'm grasping but it's bugging me....