http://www.npr.org/blogs/parallels/2014/11/21/365731378/wealthy-arabs-flock-to-pakistan-to-kill-the-bustards

Male bustards attract their partners as men do, by strutting
around, puffing themselves up, and aimlessly darting about at high speed. But
every winter, the Houbara bustard makes the same mistake: They fly from Central
Asia to Pakistan by the thousands. As icy temperatures set in there, the
bustards head south to warm themselves up on the Pakistani deserts and plains
that roll down to the Arabian Sea.

But others also fly here at the same time. They come by private jet and are very
rich and often royal. They hail from Saudi Arabia, the United Arab Emirates,
Qatar and Bahrain. The Arabs began hunting bustards thousands of years ago and
never stopped. Bustard meat is apparently thought to do wonders for the sex
drive.