Cymbidium dayanum
 

Cymbidium dayanum grows high in the tree. They usually grow in to large plants and sometimes they would fall from the trees after typhoon hits.
http://blog-imgs-100.fc2.com/p/h/e/pheli/DSC_4425.jpg
http://blog-imgs-100.fc2.com/p/h/e/pheli/DSC_4420.jpg
http://blog-imgs-100.fc2.com/p/h/e/pheli/DSC_4426.jpg

Where did you find them?

That's pretty cool to see.

In the central Taiwan, about 700 meters above sea level.

that's for sharing, amazing in situ pics!