I have a combination aviary/greenhouse.
I HAVE TO
keep them separated from my plants.
ABSOLUTELY, as they will pretty much tear up any vegetative matter.
My birds are finches and grossbeaks.
And they LOVE greens.
So I buy them their own romaine lettuce heads that I "spike" onto a branch on one of their personal trees,(down'ed trees that I've cut down to greenhouse size and then sunk into the gravel for an arboreal finch atmosphere...), and they will tear the smithereens out of those within 3 days.
Trust me, if your finches get into your orchids, you'll be losing the orchids pretty quickly.
The quail sound pretty nice and safe.
But your flying birds need to be kept separately from your orchids, I SWEAR.
Speaking from personal,(and tragic
I use inexpensive window screen material,( the rolls you can buy dirt-cheap at any home improvement/lumber store), stapled to 2x4's mounted vertically between the ceiling and the ground and anchored as a see-through wall, a slit through one screen allows me a walk-through between sides. As long as that slit isn't gappy, the birds don't kniw it;s an opening, so they never cross into the orchids.
I have little mini fountain bird bath I've made from an aquarium pump and some rocks in a basin and they just sing and splash and carry on when I switch it on each day.
It's nice, but you do have to plan and protect accordingly.