I hunted without a dog for a few years after my setter died. We had always hunted high country blue grouse in the Winthrop/Okanogan area and always had a great time. When hunting with a dog, we would focus on birds near the ground and if they busted and got into trees, I would be too impatient to spend a lot of time looking for them so we usually moved on after a few minutes. Without a dog, when I bumped a bird and it treed, I spent more time learning how to find it. Patience is key here. Make a mental note of which tree the bird flew into and how high in the tree it was. Start looking for the silhouette of the bird in any open areas between branches. Take your time. If you don't see it from the first vantage point, slowly walk a circle around the tree and keep looking. You'll hear it if it flies away but they usually hold pretty tight because they believe you can't see them. Just keep looking for that lump on a branch that doesn't look like a tree part. Maybe circle the tree several times if you're sure it didn't fly off. Once I started being more methodical about searching treed birds, I was amazed at how successful I'd be. Hunting with a dog is still the best, but if you are willing to alter your technique a bit, you can still bag some birds in trees.