Female RT's - disproportionately low numbers?

[redbird1]

I know this is "off-season" for trapping, but I have a question nonetheless: Why does it seem there are always more male passage RT's to trap than females? I have trapped a few males ( males as far as I know; 900 - 1000g) and but I have not seen or trapped any of these 1100g. "plus" hens that people talk about (much less, 1400g - 1500g.). Also, most of the birds that other falconers trap in GA (at least from conversations I have with other falconers) tend to be heavily wieghted towards males - 1000g. or less. I am an apprentice, new at all this, so maybe my perception is skewed by my limited experience and conversations. What are the group's thoughts?
Mike

[Minca]

This last year people were trapping alot of the big females in Texas, and early on in the season. Whereas here in AZ I couldn't barely find any passages until November. I think the weather and storm fronts have alot to do with it, and I wouldn't be suprised if the females don't always migrate as far south as the males...