成群结队的红尾蚺蟒、美洲巨蟒以及玉米锦蛇都蜷缩着躺在一张毛毯下面，等待着让它们加入到课程中来的信号，这就是当今推崇的蛇瑜伽健身课程。
Very real boa constrictors , pythons and corn snakes are laying curled up together under a blanket , waiting for their cue to join in the class .
红尾蚺