On the South American pampas you ride one horse and lead your fastest when you are after ostriches. The birds raise their wings and sail before the wind at an awful pace and if you do not get up to one soon after he starts you might as well give up. When you get near you change horses, and, taking your bolas (three balls as big as pigeon eggs of lead or brass, on a plaited rawhide thong) from around your middle, begin to swing them around in your right hand keeping your finger hooked through the fork of the thong, holding one ball in your hand. As you close up, you bring them over your head, letting your finger loose them to their six foot length. You send your gee along and, bending forward, loose them at your ostrich. If you hit him, the bolas tangle him up and down he comes. If there are holes and things, you come down instead. It is a fast thing and as often as not or oftener you are bareback. Sometimes fellows make a big circle and close in on the birds; then you have a lively time, particularly if you play at being an ostrich yourself.