Hi Sharon,

They appear to be Phalaenopsis orchid hybrids. I don't see any pots and many of the plants are growing with the crown facing downward, which also suggests direct attachment to the tree. You can do this with a little patience. They will need supplemental water in the dry season and if the rains can't reach them as well as protection from any cold snaps that reach your area. It will take them some time to adapt before they develop enough roots to support themselves.

Be aware that they will not be constantly in bloom. Perhaps, if you mix some summer blooming hybrids in with the typical spring blooming hybrids, you could prolong the show.

Meg

Phals do not like much bright light so if you have no direct sun then phals will be happy there. If you have some areas that get dappled or direct sun different orchids will grow there. Most of the life of an orchid is without flowers. A staggered for blooming collection will provide something in bloom all the time. But you will need a sunny area for those. The best and fastest way to get up to speed is join the WPB orchid society. Growers come to meetings to speak and sell orchids. New friends too. Worth while.