photo/bon_monastery.png

"Bön" is used to describe three distinct traditions: • the pre-Buddhist religious practices of Tibetans that are "imperfectly reconstructed essentially different from Buddhism" and were focused on the personage of a divine king; • a syncretic religion that arose in Tibet during the 10th and 11th centuries, with strong shamanistic and animistic traditions, that is often regarded by scholars as "an unorthodox form of Buddhism;" • "a vast and amorphous body of popular beliefs" including fortune telling. However, other scholars do not accept the tradition that separates Bön from Buddhism. This came from Wikipedia.
Generally speaking, in Bon Monasteries one will see wild animals stuffed hanging near the door. Birds will also be seen. Ritualistic healing utensils will be hanging from pillars. Bon, from my understanding was an older religion than Buddhism and was incorporated with Buddhism as it took hold in Tibet. Seemingly it was not an easy incorporation. There were wars between the Bon kings and monasteries and finally Bon became part of the Buddhist way. Not many true Bon monasteries still are practiced, generally other than the decorum one can't see the difference in teachings or prayer.